http://publicationslist.org/data/mark.crowe/atom.xml Mark Crowehttp://publicationslist.org/mark.crowe$basepathfavicon.icoRecent additions to Mark Crowe's PublicationsList.org pagehttp://publicationslist.org/publications.png2011-06-14T15:26:22Z http://publicationslist.org/mark.crowe/refid5 2011-06-14T15:14:20Z

The oestrous cycle in cattle lasts for 18-24 days. It consists of a luteal phase (14-18 days) and a follicular phase (4-6 days). During the cycle there are generally two (dairy cows) or three (heifers and beef cows) waves of ovarian follicle growth. Each wave of follicle growth consists of a period of emergence of a cohort of follicles, selection of a dominant follicle and either atresia or ovulat...<br/><br/>N Forde, M E Beltman, P Lonergan, M Diskin, J F Roche, M A Crowe (2011) <i>Anim Reprod Sci</i> <i></i> <i></i> 124: 3-4 163-169<br/>

http://publicationslist.org/mark.crowe/refid7 2011-06-14T15:14:20Z

The objective was to investigate if Banding or Burdizzo castration of bulls would alter the gene expression profile of a range of peripheral leukocyte inflammatory cytokines (IL-1, IL-6, IL-8, IL-10, interferon-γ and tumor necrosis factor-α) and to determine if the administration of carprofen (C) before castration would affect the expression of these genes. Thirty Holstein-Friesian bulls (5.5 mo...<br/><br/>W Y Pang, B Earley, M Murray, T Sweeney, V Gath, M A Crowe (2011) <i>Res Vet Sci</i> <i></i> <i></i> 90: 1 127-132<br/>

http://publicationslist.org/mark.crowe/refid1 2011-06-14T15:14:20Z

Progesterone induced blocking factor (PIBF) and galectins modulate the maternal immune response during pregnancy. We hypothesized that the relative transcript abundance of the above genes would be different during the luteal phase/early pregnancy, and would be affected by progesterone supplementation. To further test this hypothesis protein expression analyses were carried out to evaluate the abun...<br/><br/>Lilian A Okumu, Trudee Fair, Julia Szekeres-Bartho, Alan M O'Doherty, Mark A Crowe, James F Roche, Patrick Lonergan, Niamh Forde (2011) <i>Physiol Genomics</i> <i></i> <i></i> : <br/>

http://publicationslist.org/mark.crowe/refid4 2011-06-14T15:14:20Z

In cattle, elevated concentrations of circulating progesterone (P4) in the immediate postconception period are associated with advanced conceptus development, while low P4 is implicated as a causative factor in low pregnancy rates observed in dairy cows. This study aimed to: 1) describe the transcriptional changes that occur in the bovine endometrium during the estrous cycle, 2) determine how elev...<br/><br/>N Forde, M E Beltman, G B Duffy, P Duffy, J P Mehta, P O'Gaora, J F Roche, P Lonergan, M A Crowe (2011) <i>Biol Reprod</i> <i></i> <i></i> 84: 2 266-278<br/>

http://publicationslist.org/mark.crowe/refid9 2011-06-14T15:14:20Z

To investigate the effects of pregnancy or post-ovulatory progesterone (P(4)) supplementation on the expression of oestrogen and P(4) receptors (ESRs and PGRs) in the bovine uterus, heifers (n=263) were randomly assigned to the following treatments: i) cyclic, normal P(4); ii) cyclic, high P(4); iii) pregnant, normal P(4); and iv) pregnant, high P(4) on days 5, 7, 13 and 16 of pregnancy/oestrous c...<br/><br/>L A Okumu, N Forde, A G Fahey, E Fitzpatrick, J F Roche, M A Crowe, P Lonergan (2010) <i>Reproduction</i> <i></i> <i></i> 140: 1 143-153<br/>

http://publicationslist.org/mark.crowe/refid8 2011-06-14T15:14:20Z

Improving the energy status of dairy cows during the early post-partum (PP) period by adding a safe dietary supplement such as live yeast culture (YS) may have a positive effect on reproductive function. The objective was to examine potential benefits of YS supplementation on PP energy status and fertility indices of dairy cows managed to have low or high body condition score (BCS, 1-5 scale) at c...<br/><br/>R M AlIbrahim, M A Crowe, P Duffy, L O'Grady, M E Beltman, F J Mulligan (2010) <i>Anim Reprod Sci</i> <i></i> <i></i> 121: 1-2 63-71<br/>

http://publicationslist.org/mark.crowe/refid6 2011-06-14T15:14:20Z

The aim of the present study was to compare the hormonal and metabolic characteristics and endometrial gene expression profiles in beef heifers yielding either a viable or degenerate embryo on Day 7 after insemination as a means to explain differences in embryo survival. Oestrus was synchronised in cross-bred beef heifers (n = 145) using a controlled internal drug release (CIDR)-prostaglandin prot...<br/><br/>M E Beltman, N Forde, P Furney, F Carter, J F Roche, P Lonergan, M A Crowe (2010) <i>Reprod Fertil Dev</i> <i></i> <i></i> 22: 6 987-999<br/>

http://publicationslist.org/mark.crowe/refid3 2011-06-14T15:14:20Z

The objective was to investigate the effect of sea transport on the physiological, behavioural and performance responses of bulls. One-hundred and eleven bulls (mean body weight (standard error of the mean) 429 (5.7kg)) were randomly assigned to one of three treatments; control (C; n=54) bulls were housed in 6 pens at Teagasc, Grange Research Centre at a stocking density of (1), 1.7 m(2)/head (C1....<br/><br/>B Earley, B McDonnell, M Murray, D J Prendiville, M A Crowe (2010) <i>Res Vet Sci</i> <i></i> <i></i> : <br/>

http://publicationslist.org/mark.crowe/refid2 2011-06-14T15:14:20Z

Beef suckler farms (194 farms throughout 13 counties) were assessed once with housed cattle and once with cattle at grass using an animal welfare index (AWI). Twenty-three of the 194 farms were revisited a year later and re-evaluated using the AWI and the Tier-Gerechtheits-Index 35L/2000 (TGI35L/2000). Thirty-three indicators were collected in five categories: locomotion (5 indicators); social int...<br/><br/>Mickael Mazurek, Daniel J Prendiville, Mark A Crowe, Isabelle Veissier, Bernadette Earley (2010) <i>BMC Vet Res</i> <i></i> <i></i> 6: <br/>

http://publicationslist.org/mark.crowe/refid15 2011-06-14T15:17:50Z

Progesterone is essential for establishment and maintenance of pregnancy in mammals. The objective of this study was to examine the effect of elevating progesterone during the different physiological stages of early embryo development on embryo survival. Estrus was synchronized in cross-bred beef heifers (n=197, approximately 2-years old) and they were inseminated 12-18h after estrus onset (=Day 0...<br/><br/>M E Beltman, P Lonergan, M G Diskin, J F Roche, M A Crowe (2009) <i>Theriogenology</i> <i></i> <i></i> 71: 7 1173-1179<br/>

http://publicationslist.org/mark.crowe/refid17 2011-06-14T15:17:50Z

The hypothesis was that supplementation during the late prepartum period will differentially affect reproductive and productive variables according to parity. Primiparous (n=22) and multiparous (n=22) pregnant autumn calving Holstein cows were stratified in two groups according to parity (primiparous or multiparous) and within each group were randomly assigned to two treatments: (a) low supplement...<br/><br/>D Cavestany, C Viñoles, M A Crowe, A La Manna, A Mendoza (2009) <i>Anim Reprod Sci</i> <i></i> <i></i> 114: 1-3 1-13<br/>

http://publicationslist.org/mark.crowe/refid19 2011-06-14T15:17:50Z

The objectives were to determine the effects of (i) time during the first FSH increase of the estrous cycle (time-course study) and (ii) exogenous steroid treatment (steroid feedback study) on the relationship between circulating serum gonadotropins, and the proportions of pituitary cells immunoreactive for gonadotropins and steroid receptors during the estrous cycle in heifers. Pituitaries were c...<br/><br/>Elizabeth A Lane, Torres Sweeney, Marion Ryan, James F Roche, Mark A Crowe (2009) <i>Anim Reprod Sci</i> <i></i> <i></i> 112: 1-2 66-82<br/>

http://publicationslist.org/mark.crowe/refid13 2011-06-14T15:17:50Z

The postovulatory rise in circulating progesterone (P4) concentrations is associated with increased pregnancy success in beef and dairy cattle. Our study objective was to determine how elevated P4 alters endometrial gene expression to advance conceptus development. Synchronized heifers were inseminated (Day 0) and randomly assigned to pregnant high P4 or to pregnant normal P4. All high P4 groups r...<br/><br/>N Forde, F Carter, T Fair, M A Crowe, A C O Evans, T E Spencer, F W Bazer, R McBride, M P Boland, P O'Gaora, P Lonergan, J F Roche (2009) <i>Biol Reprod</i> <i></i> <i></i> 81: 4 784-794<br/>

http://publicationslist.org/mark.crowe/refid14 2011-06-14T15:17:50Z

A H G Piebes, B van de Griend, M J W Rijnders, I J R de Vries, G C van der Weijden, M A Crowe, E Gruys (2009) <i>Tijdschr Diergeneeskd</i> <i></i> <i></i> 134: 11 486-490<br/>

http://publicationslist.org/mark.crowe/refid11 2011-06-14T15:17:50Z

Two experiments were designed to evaluate models for generation of low circulating progesterone concentrations during early pregnancy in cattle. In Experiment 1, 17 crossbred heifers (Bos taurus) were assigned to either prostaglandin F(2alpha) (PGF(2alpha)) administration on Days 3, 3.5, and 4 (PG3; n=9) or to control (n=8). Blood samples were collected from heifers from Days 1 to 9 for progestero...<br/><br/>M E Beltman, J F Roche, P Lonergan, N Forde, M A Crowe (2009) <i>Theriogenology</i> <i></i> <i></i> 72: 7 986-992<br/>

http://publicationslist.org/mark.crowe/refid10 2011-06-14T15:17:50Z

Castration of male cattle has been shown to elicit inflammatory reactions and acute inflammation is initiated and sustained by the participation of cytokines.<br/><br/>Wanyong Pang, Bernadette Earley, Torres Sweeney, Vivian Gath, Mark A Crowe (2009) <i>BMC Vet Res</i> <i></i> <i></i> 5: <br/>

http://publicationslist.org/mark.crowe/refid12 2011-06-14T15:17:50Z

The objective was to investigate measures of neutrophil function in response to banding or burdizzo castration of bulls. Thirty-two Holstein-Friesian bulls (14 mo old, 505 +/- 7.8 kg of BW) were assigned to 1 of 4 treatment groups: 1) sham-handled control (CON); 2) banding castration alone (BAND); 3) burdizzo castration alone (BURD); or 4) cortisol infusion (CORT) as a further control group. For e...<br/><br/>W Y Pang, B Earley, T Sweeney, S Pirani, V Gath, M A Crowe (2009) <i>J Anim Sci</i> <i></i> <i></i> 87: 10 3187-3195<br/>

http://publicationslist.org/mark.crowe/refid20 2011-06-14T15:17:50Z

Higher systemic progesterone in the immediate post-conception period is associated with an increase in embryonic growth rate, interferon-tau production and pregnancy rate in cattle. The objective of this study was to examine the effect of increasing progesterone concentration on Day 3 on subsequent embryo survival and development. Oestrus (Day 0) was synchronised in beef-cross heifers (n=210) and ...<br/><br/>F Carter, N Forde, P Duffy, M Wade, T Fair, M A Crowe, A C O Evans, D A Kenny, J F Roche, P Lonergan (2008) <i>Reprod Fertil Dev</i> <i></i> <i></i> 20: 3 368-375<br/>

http://publicationslist.org/mark.crowe/refid22 2011-06-14T15:17:50Z

Stress and its association with altered immune function and incidence of respiratory diseases in cattle have lead to concerns over animal health and welfare during truck transportation. Previously, bulls subjected to transportation stress displayed altered expression of candidate neutrophil genes, warranting a broader investigation of the neutrophil transcriptome and possible associations with flu...<br/><br/>K R Buckham Sporer, L Xiao, R J Tempelman, J L Burton, B Earley, M A Crowe (2008) <i>Vet Immunol Immunopathol</i> <i></i> <i></i> 121: 3-4 300-320<br/>

http://publicationslist.org/mark.crowe/refid21 2011-06-14T15:17:50Z

Transportation causes stress in cattle that may alter numerous physiological variables with a negative impact on production and health. The objectives of the current study were to investigate the physiological effects of truck transportation and to characterize a pattern of phenotypes in the circulation that may aid in the early identification of stress-susceptible animals that often succumb to se...<br/><br/>K R Buckham Sporer, P S D Weber, J L Burton, B Earley, M A Crowe (2008) <i>J Anim Sci</i> <i></i> <i></i> 86: 6 1325-1334<br/>

http://publicationslist.org/mark.crowe/refid16 2011-06-14T15:17:50Z

There is a variable anoestrous period following parturition in the cow. Follicular growth generally resumes within 7-10 days in the majority of cows associated with a transient follicle-stimulating hormone (FSH) rise that occurs within 3-5 days of parturition. Dairy cows that are not nutritionally stressed generally ovulate their first post-partum dominant follicle (approximately 15 days), whereas...<br/><br/>M A Crowe (2008) <i>Reprod Domest Anim</i> <i></i> <i></i> 43 Suppl 5: 20-28<br/>

http://publicationslist.org/mark.crowe/refid18 2011-06-14T15:17:50Z

Oestrous synchronisation is an important strategy to improve reproductive management of cattle. The use of oestradiol-17beta, and its related ester derivatives, in food-producing cattle for the purposes of oestrous synchronisation is prohibited in the European Union since October 2006; a serious limitation in the implementation of large-scale use of cost effective synchronisation regimens in both ...<br/><br/>E A Lane, E J Austin, M A Crowe (2008) <i>Anim Reprod Sci</i> <i></i> <i></i> 109: 1-4 1-16<br/>

http://publicationslist.org/mark.crowe/refid26 2011-06-14T15:17:50Z

The effect of various space allowances on the pituitary, adrenal and immune responses and on performance was investigated in 72 mature Holstein x Friesian beef bulls. The animals (weighing 403+/-3.5 kg) were blocked by weight and randomly assigned to two groups (familiar, F, and unfamiliar, UF) x three treatments (1.2, 2.7 and 4.2m(2) per bull; n=24 per space allowance), and housed for 83 days in ...<br/><br/>S Gupta, B Earley, M A Crowe (2007) <i>Vet J</i> <i></i> <i></i> 173: 3 594-604<br/>

http://publicationslist.org/mark.crowe/refid27 2011-06-14T15:17:50Z

The effects of transporting Holstein Friesian bulls (n=72; bodyweight 403+/-3.5 kg) for 12h by road were examined. Adrenal, haematological and immune responses, body temperature and performance were recorded. The animals had been previously housed for 96 days at three space allowances (1.2, 2.7 or 4.2m(2) per bull). The bulls were allocated to one of two treatments: T (transport for 12h; n=16 per ...<br/><br/>S Gupta, B Earley, M A Crowe (2007) <i>Vet J</i> <i></i> <i></i> 173: 3 605-616<br/>

http://publicationslist.org/mark.crowe/refid24 2011-06-14T15:17:50Z

Dominant follicles are those that continue to develop and have the potential to ovulate while subordinate follicles regress. Characteristics of dominant follicles include a larger diameter, higher intrafollicular estradiol, and lower IGF-binding protein (IGFBP)-4 concentrations compared with other cohort follicles. Follicle development is regulated by endocrine hormones that act via intracellular ...<br/><br/>K E Ryan, S M Casey, M J Canty, M A Crowe, F Martin, A C O Evans (2007) <i>Reproduction</i> <i></i> <i></i> 133: 3 617-626<br/>

http://publicationslist.org/mark.crowe/refid23 2011-06-14T15:17:50Z

The transportation of beef cattle results in a stress response that is associated with increased susceptibility and severity of respiratory diseases, presumably due to an alteration in immune function. Neutrophils are phagocytic immune cells important in lung defense and are also targets of the stress response. The objective of this study was to determine if a 9h transportation of young bulls by r...<br/><br/>K R Buckham Sporer, J L Burton, B Earley, M A Crowe (2007) <i>Vet Immunol Immunopathol</i> <i></i> <i></i> 118: 1-2 19-29<br/>

http://publicationslist.org/mark.crowe/refid28 2011-06-14T15:17:50Z

The objective of this study was to determine the effect of carprofen (C) administration before banding or burdizzo castration of bulls on cortisol, in vitro interferon-gamma (IFN-gamma) production, acute-phase proteins, feed intake, and growth. Fifty Holstein Friesian bulls (5.5 mo old; 191 +/- 3.7 kg) were blocked by weight and assigned randomly to 1 of 5 treatments (n = 10/treatment): 1) untreat...<br/><br/>W Y Pang, B Earley, T Sweeney, M A Crowe (2006) <i>J Anim Sci</i> <i></i> <i></i> 84: 2 351-359<br/>

http://publicationslist.org/mark.crowe/refid25 2011-06-14T15:17:50Z

The aim of this study was to evaluate the effect of active immunization against GnRH on ovarian activity, plasma progesterone and estradiol concentrations and on estrous behavior in adult mares. Eighteen cyclic mares were randomly divided into a treatment and control group. Nine mares were immunized twice with 2 mL (400 microg GnRH-protein conjugate) of a GnRH-vaccine (Improvac, CSL Limited, Austr...<br/><br/>I Imboden, F Janett, D Burger, M A Crowe, M Hässig, R Thun (2006) <i>Theriogenology</i> <i></i> <i></i> 66: 8 1866-1875<br/>

http://publicationslist.org/mark.crowe/refid29 2011-06-14T15:17:50Z

The objective was to determine the pattern of IGFBP-2, -3 and -4 gene expression and follicular fluid concentrations of IGFBP-2, -3, -4 and -5 during emergence, selection and dominance of the first follicle wave of the estrous cycle in cattle and during exogenous steroid treatment. Heifers (n = 35) were ovariectomized at 36 (n = 7), 66 (n = 8), 84 (n = 12) and 108 (n = 8) h after the onset of estr...<br/><br/>M J Canty, M P Boland, A C O Evans, M A Crowe (2006) <i>Anim Reprod Sci</i> <i></i> <i></i> 93: 3-4 199-217<br/>

http://publicationslist.org/mark.crowe/refid30 2011-06-14T15:17:50Z

To investigate the effect of repeated regrouping and repenning (R&R) on the hypothalamic-pituitary-adrenal axis, immune function, blood biochemical and hematological variables, and ADG, 72 Holstein-Friesian (14-mo-old; 441 +/- 3.2 kg) steers were assigned to either the control (C; n = 30) or regrouped (R; n = 42) treatments and housed six per pen in 12 pens. The R steers were exposed to six R&R ov...<br/><br/>S Gupta, B Earley, S T L Ting, M A Crowe (2005) <i>J Anim Sci</i> <i></i> <i></i> 83: 8 1948-1958<br/>

http://publicationslist.org/mark.crowe/refid31 2011-06-14T15:17:50Z

The objective was to determine if a single measurement of plasma insulin-like growth factor-1 (IGF-1) could predict the number of viable embryos obtained from donors and the likelihood of pregnancy in recipients in multiple ovulation and embryo transfer (MOET) programs in cattle. The embryo yields from 101 embryo recoveries were examined in maiden Holstein heifers (n=75) and multiparous Holstein c...<br/><br/>M A Velazquez, M Newman, M F Christie, P J Cripps, M A Crowe, R F Smith, H Dobson (2005) <i>Theriogenology</i> <i></i> <i></i> 64: 9 1977-1994<br/>

http://publicationslist.org/mark.crowe/refid32 2011-06-14T15:17:50Z

The objective was to determine if the endocrine status of the animal dictates the responsiveness of gonadotrophs to estradiol, activin, inhibin and follistatin; hormones implicated in the differential release of luteinizing hormone (LH) and follicle-stimulating hormone (FSH). Bovine pituitaries were obtained at 13 (n=8), 30 (n=24) and 66 (n=8) h after the onset of estrus, corresponding to before, ...<br/><br/>E A Lane, V Padmanabhan, J F Roche, M A Crowe (2005) <i>Domest Anim Endocrinol</i> <i></i> <i></i> 28: 2 190-201<br/>

http://publicationslist.org/mark.crowe/refid35 2011-06-14T15:17:50Z

In post-partum anestrous beef cows suckling calves, neither the choice of hormonal regime to ensure the presence of a healthy dominant follicle at the end of a progestagen treatment nor the optimum hormone to induce estrus and ovulation is clear. Twenty-eight beef cows, in good body condition, 25-30 days post-partum, were assigned to one of four treatments: (i) 3mg norgestomet (N) implant with 5mg...<br/><br/>Pat Duffy, Mark A Crowe, Edward J Austin, Monika Mihm, Maurice P Boland, James F Roche (2004) <i>Theriogenology</i> <i></i> <i></i> 61: 4 725-734<br/>

http://publicationslist.org/mark.crowe/refid34 2011-06-14T15:17:50Z

This study tested the hypotheses that: (1) either acute stress induced by Burdizzo castration, or cortisol infusion would modulate plasma glucose, insulin and growth hormone (GH) concentrations; and (2) immune modulation induced by cortisol would be dependent on the pattern, intensity and duration of circulating cortisol concentrations. Fifty 9.2-month-old Holstein x Friesian bulls (232 +/- 2.0 kg...<br/><br/>S T L Ting, B Earley, M A Crowe (2004) <i>Domest Anim Endocrinol</i> <i></i> <i></i> 26: 4 329-349<br/>

http://publicationslist.org/mark.crowe/refid33 2011-06-14T15:17:50Z

The objective of this study was to determine an appropriate exogenous dose of bovine corticotropin-releasing hormone (bCRH) to stimulate the physiological effects of the hypothalamic-pituitary-adrenal axis in steers as a method to test the sensitivity of the pituitary and adrenal gland. Twenty 14-mo-old Holstein-Friesian steers were blocked by weight (443.7+/-2.5 kg) and randomly allotted to recei...<br/><br/>S Gupta, B Earley, S T L Ting, N Leonard, M A Crowe (2004) <i>J Anim Sci</i> <i></i> <i></i> 82: 7 1952-1956<br/>

http://publicationslist.org/mark.crowe/refid36 2011-06-14T15:17:50Z

To determine the effects of burdizzo castration alone or in combination with ketoprofen (K), local anesthesia (LA), or caudal epidural anesthesia (EPI) on plasma cortisol, acute-phase proteins, interferon-gamma production, growth, and behavior of beef cattle, 50 Holstein x Friesian bulls (13 mo old, 307 +/- 5.3 kg) were assigned to (n = 10/treatment): 1) control (handled; C); 2) burdizzo castratio...<br/><br/>S T L Ting, B Earley, J M L Hughes, M A Crowe (2003) <i>J Anim Sci</i> <i></i> <i></i> 81: 5 1281-1293<br/>

http://publicationslist.org/mark.crowe/refid37 2011-06-14T15:17:50Z

To determine the effect of repeated ketoprofen (K) administration to surgically castrated bulls on cortisol, acute-phase proteins, immune function, feed intake, growth and behavior, 50 Holstein x Friesian bulls (11 mo old; 300 +/- 3.3 kg) were assigned to one of five treatments: 1) untreated control (C); 2) surgical castration at 0 min (S); 3) S following an i.v. injection of 3 mg/kg of BW of K at...<br/><br/>S T L Ting, B Earley, M A Crowe (2003) <i>J Anim Sci</i> <i></i> <i></i> 81: 5 1253-1264<br/>

http://publicationslist.org/mark.crowe/refid39 2011-06-14T15:17:50Z

To determine the effects of the anti-inflammatory ketoprofen, alone or with local anesthesia (LA) during castration on cortisol, immune, and acute phase responses, 40 Friesian calves (215 +/- 3.5 kg) were assigned as follows: 1) control, 2) surgical castration (SURG), 3) SURG following ketoprofen (3 mg/kg BW i.v.; SURG + K), 4) SURG following LA (9 mL of 2% lidocaine hydrochloride to each testis; ...<br/><br/>B Earley, M A Crowe (2002) <i>J Anim Sci</i> <i></i> <i></i> 80: 4 1044-1052<br/>

http://publicationslist.org/mark.crowe/refid40 2011-06-14T15:17:50Z

Tissue samples were collected postmortem from 126 sheep at five lymphoreticular sites by different techniques. The three most successful combinations of sites and techniques were: the third eyelids, using a forceps and scissors, which provided a mean (se) of 5.32 (0.70) lymphoid follicles per 5 microm tissue section, a mandibular lymph node, using a Biopty gun, which gave 1.19 (0.26) lymphoid foll...<br/><br/>C M A Thuring, M A Crowe, H McAllister, B Earley, J F Roche, T Sweeney (2002) <i>Vet Rec</i> <i></i> <i></i> 150: 4 97-102<br/>

http://publicationslist.org/mark.crowe/refid38 2011-06-14T15:17:50Z

Ovarian follicle growth in cattle culminates in the selection of a single dominant follicle which attains the ability for final maturation and ovulation once or twice during the luteal phase and at the end of the oestrous cycle, as well as during other reproductive states. This review will describe in detail the first follicle wave of the cycle leading to selection of the first wave dominant folli...<br/><br/>M Mihm, M A Crowe, P G Knight, E J Austin (2002) <i>Reprod Domest Anim</i> <i></i> <i></i> 37: 4 191-200<br/>

http://publicationslist.org/mark.crowe/refid43 2011-06-14T15:17:50Z

To evaluate the roles of FSH and LH in follicular growth, GnRH-immunized anestrous heifers (n = 17) were randomly assigned (Day 0) to one of three groups (n = 5 or 6). Group 1 received i.m. injections of 1.5 mg porcine FSH (pFSH) 4 times/day for 2 days; group 2 received i.v. injections of 150 microg pLH 6 times/day for 6 days; group 3 received both pFSH and pLH as described for groups 1 and 2. Aft...<br/><br/>M A Crowe, P Kelly, M A Driancourt, M P Boland, J F Roche (2001) <i>Biol Reprod</i> <i></i> <i></i> 64: 1 368-374<br/>

http://publicationslist.org/mark.crowe/refid42 2011-06-14T15:17:50Z

The aim was to determine the effect of estradiol benzoate (EDB) given after removal of a progesterone-releasing intravaginal device (PRID) at either emergence or dominance of a follicle wave, on the interval to estrus, variation in its onset and pregnancy rate in heifers. Heifers (n=186) were assigned randomly to four treatments in a 2 x 2 factorial design; emergence or dominance of a follicle wav...<br/><br/>E A Lane, E J Austin, J F Roche, M A Crowe (2001) <i>Theriogenology</i> <i></i> <i></i> 55: 9 1807-1818<br/>

http://publicationslist.org/mark.crowe/refid41 2011-06-14T15:17:50Z

The aim was to compare the estrous response in heifers given either gonadotropin-releasing hormone (GnRH) or estradiol benzoate (EDB) at the start of a progesterone treatment initiated at emergence or dominance of the first or second follicular wave of the estrous cycle. Cross-bred beef heifers (n=134) were assigned to 1 of 3 treatments; 0.75 mg EDB given at insertion of a progesterone-releasing i...<br/><br/>E A Lane, E J Austin, J F Roche, M A Crowe (2001) <i>Theriogenology</i> <i></i> <i></i> 56: 1 79-90<br/>

http://publicationslist.org/mark.crowe/refid44 2011-06-14T15:17:50Z

Prolonged postpartum anoestrus in beef cows is due to failure of early dominant follicles to ovulate. It is hypothesized that this failure to ovulate is due to inadequate LH pulse frequency. The objective of this study was to determine whether administration of hourly LH pulses would cause the first dominant follicle to ovulate. In Expt 1, 16 cows received either saline (n = 8) or porcine LH (pLH;...<br/><br/>P Duffy, M A Crowe, M P Boland, J F Roche (2000) <i>J Reprod Fertil</i> <i></i> <i></i> 118: 1 9-17<br/>

http://publicationslist.org/mark.crowe/refid45 2011-06-14T15:17:50Z

To test the hypothesis that emergence of follicle waves postpartum is associated with a change in circulating FSH isoform distribution, 10 Limousin-cross suckler cows were blood sampled daily from 5 wk prepartum until first ovulation postpartum for FSH, LH, estradiol (E2), and progesterone assay. Follicular growth was monitored daily by ultrasonography from Days 5 to 10 postpartum until first ovul...<br/><br/>M A Crowe, V Padmanabhan, M Mihm, I Z Beitins, J F Roche (1998) <i>Biol Reprod</i> <i></i> <i></i> 58: 6 1445-1450<br/>

http://publicationslist.org/mark.crowe/refid49 2011-06-14T15:17:50Z

The objective of this study was to determine the effects of castration, with its presumed pain and inflammatory effects, including increased cortisol, and elevated cortisol per se on in vitro interferon-gamma (IFN-gamma) production, ADG, ADFI, and plasma haptoglobin and fibrinogen. Thirty Friesian bull calves (174 +/- 3.8 kg) were assigned to three treatments (given on d 0): 1) control (CON); 2) i...<br/><br/>A D Fisher, M A Crowe, E M O'Nualláin, M L Monaghan, J A Larkin, P O'Kiely, W J Enright (1997) <i>J Anim Sci</i> <i></i> <i></i> 75: 4 1041-1047<br/>

http://publicationslist.org/mark.crowe/refid47 2011-06-14T15:17:50Z

Blood samples were collected from heifers (n = 6; 450 +/- 7.7 kg) 2-4 times a day during the first and second follicular waves, and during the gonadotrophin surge to determine whether changes in circulating FSH isoforms occur during cyclic quantitative changes in FSH throughout the oestrous cycle. Serum was assayed for FSH, LH, oestradiol and progesterone. Selected samples collected during the fir...<br/><br/>D J Cooke, M A Crowe, J F Roche (1997) <i>J Reprod Fertil</i> <i></i> <i></i> 110: 2 339-345<br/>

http://publicationslist.org/mark.crowe/refid48 2011-06-14T15:17:50Z

The objective was to determine the effects of reducing the plasma cortisol rise in calves following castration on plasma ACTH concentrations, keyhole limpet hemocyanin (KLH)- and concanavalin A (Con A)-induced in vitro interferon (IFN)-gamma production, white blood cell (WBC) numbers, neutrophil:lymphocyte (N:L) ratio, plasma haptoglobin and fibrinogen concentrations, ADG, and ADFI. Forty 5-mo-old...<br/><br/>A D Fisher, M A Crowe, E M O'Nualláin, M L Monaghan, D J Prendiville, P O'Kiely, W J Enright (1997) <i>J Anim Sci</i> <i></i> <i></i> 75: 7 1899-1908<br/>

http://publicationslist.org/mark.crowe/refid46 2011-06-14T15:17:50Z

Meaningful biological interpretation of the role of follicle-stimulating hormone (FSH) requires use of a validated radioimmunoassay (RIA) that closely estimates biologically active FSH, which was the objective of this work. Three FSH antibodies [NIDDK anti ovine FSH (oFSH); JAD anti oFSH; USDA anti bFSH] were screened against three tracer preparations [USDA oFSH-19-SIAFP-I2(USDA oFSH I2); LER1976a...<br/><br/>M A Crowe, V Padmanabhan, N Hynes, S J Sunderland, W J Enright, I Z Beitins, J F Roche (1997) <i>Anim Reprod Sci</i> <i></i> <i></i> 48: 2-4 123-136<br/>

http://publicationslist.org/mark.crowe/refid51 2011-06-14T15:17:50Z

To determine the effects of castration of calves, with or without local anesthesia, on plasma cortisol, scrotal circumference, ADG, and ADFI, 56 Friesian bulls (5.5 mo of age; mean +/- SE BW = 173 +/- 2 kg) were randomly assigned to each of seven treatments: 1) control (CON); 2) s.c. injection of .1 mg of a human serum albumin-GnRH conjugate with DEAE-dextran adjuvant (HSA-GnRH); 3) burdizzo castr...<br/><br/>A D Fisher, M A Crowe, M E Alonso de la Varga, W J Enright (1996) <i>J Anim Sci</i> <i></i> <i></i> 74: 10 2336-2343<br/>

http://publicationslist.org/mark.crowe/refid50 2011-06-14T15:17:50Z

The objective was to determine the effect of gonadotrophin-releasing hormone (GnRH), GnRH analogue (GnRH-A) or oestradiol administration on luteinising hormone (LH) and follicle-stimulating hormone (FSH) release in GnRH-immunised anoestrous and control cyclic heifers. Thirty-two heifers (477 +/- 7.1 kg) were immunised against either human serum albumin (HSA; controls; n = 8), or a HSA-GnRH conjuga...<br/><br/>D J Prendiville, W J Enright, M A Crowe, M Finnerty, J F Roche (1996) <i>Anim Reprod Sci</i> <i></i> <i></i> 45: 3 177-190<br/>

http://publicationslist.org/mark.crowe/refid55 2011-06-14T15:17:50Z

To determine the effects of active immunization against prostaglandin F2 alpha (PGF) on estrous activity and performance traits of beef heifers, 50 14-mo-old cyclic heifers (358 +/- 3.3 kg) were assigned to two treatments (n = 25 per treatment): 1) heifers (controls) given 3.3 mg of human serum albumin (HSA) on d 0 (primary) and 27 (booster), and 2) heifers (PGF-immunized) given 3.3 mg of PGF-HSA ...<br/><br/>M A Crowe, W J Enright, P Swift, J F Roche (1995) <i>J Anim Sci</i> <i></i> <i></i> 73: 2 345-352<br/>

http://publicationslist.org/mark.crowe/refid54 2011-06-14T15:17:50Z

To investigate the effects of active immunization of cyclic beef heifers with different doses of a human serum albumin-Cys-Gly-GnRH (HSA-GnRH) conjugate on antibody titers, ovarian function, body growth, and carcass characteristics, 32 heifers (BW = 477 +/- 7.1 kg; mean +/- SE) were assigned to one of four immunization treatments: .1 mg of HSA or .01, .1, or 1.0 mg of HSA-GnRH, respectively. All h...<br/><br/>D J Prendiville, W J Enright, M A Crowe, M Finnerty, N Hynes, J F Roche (1995) <i>J Anim Sci</i> <i></i> <i></i> 73: 8 2382-2389<br/>

http://publicationslist.org/mark.crowe/refid52 2011-06-14T15:17:50Z

To develop an effective immunization protocol against human serum albumin-Cys-Gly-GnRH (HSA-GnRH) conjugate to delay the onset of puberty in heifers, 58 heifers (8 mo of age; mean +/- SE BW = 203 +/- 1 kg) were randomly assigned to each of six treatments: 1) controls, .1 mg of HSA, with diethylaminoethyl (DEAE)-dextran as adjuvant, on d 0 and 28; 2) .1 mg of HSA-GnRH, with DEAE-dextran, on d 0; 3)...<br/><br/>D J Prendiville, W J Enright, M A Crowe, L Vaughan, J F Roche (1995) <i>J Anim Sci</i> <i></i> <i></i> 73: 10 3030-3037<br/>

http://publicationslist.org/mark.crowe/refid53 2011-06-14T15:17:50Z

Growth rate of heifers is reduced by prostaglandin F2 alpha (PGF) immunization following a primary and booster regimen. The objective was to attenuate the immune response with or without a booster immunization; specifically, the effects of booster interval, dose of PGF-human serum albumin (HSA) conjugate at booster, adjuvant type, or single immunization with one or two adjuvants were examined. Thr...<br/><br/>M A Crowe, W J Enright, J F Roche (1995) <i>J Anim Sci</i> <i></i> <i></i> 73: 8 2406-2417<br/>

http://publicationslist.org/mark.crowe/refid58 2011-06-14T15:17:50Z

To optimize the prostaglandin F2 alpha (PGF) immunization protocol (conjugate [PGF-human serum albumin; PGF-HSA] dose and immunization regimen) to achieve prolonged suppression of estrous behavior (EB) in beef heifers, 56, 14-mo-old cyclic heifers were assigned (n = 7 per treatment) to eight treatments: 1) 3.3 mg of PGF-HSA on d 0 (single); 2) 3.3 mg of PGF-HSA on d 0 and 28 (booster; B); 3) as (2...<br/><br/>M A Crowe, W J Enright, D J Prendiville, C A Morrison, J F Roche (1994) <i>J Anim Sci</i> <i></i> <i></i> 72: 7 1778-1785<br/>

http://publicationslist.org/mark.crowe/refid57 2011-06-14T15:17:50Z

This study examined the correlation between measurement of follicle growth by ultrasound, and measurement of intrafollicular ratios of oestradiol and progesterone concentrations and the serum concentrations of FSH during selection, dominance and atresia or ovulation of dominant follicles in heifers. Heifers were ovariectomized on days 0 (before LH surge), 1 (after LH surge, preovulation), 1 (posto...<br/><br/>S J Sunderland, M A Crowe, M P Boland, J F Roche, J J Ireland (1994) <i>J Reprod Fertil</i> <i></i> <i></i> 101: 3 547-555<br/>

http://publicationslist.org/mark.crowe/refid56 2011-06-14T15:17:50Z

Fifty-six prepubertal Hereford cross Friesian heifers were assigned to seven treatment groups: (1) primary (day 0) and booster (day 41) using 10 mg human serum albumin (HSA) (control); (2) primary and booster (day 41) immunizations using 3.3 mg prostaglandin F2 alpha PGF-HSA conjugate; (3) primary and booster (day 83) using 3.3 mg PGF-HSA; (4) primary and booster (day 210) using 3.3 mg PGF-HSA; (5...<br/><br/>M A Crowe, W J Enright, J F Roche (1994) <i>J Reprod Immunol</i> <i></i> <i></i> 27: 3 227-240<br/>

http://publicationslist.org/mark.crowe/refid59 2011-06-14T15:17:50Z

There is a low incidence of ovulation of the first dominant follicle that develops in the early postpartum period of beef suckler cows, which prolongs the interval from calving to first ovulation. The objective of this study was to determine whether a single injection of a GnRH analogue would ovulate the first postpartum dominant follicle. Limousin x Friesian beef suckler cows were assigned at par...<br/><br/>M A Crowe, D Goulding, A Baguisi, M P Boland, J F Roche (1993) <i>J Reprod Fertil</i> <i></i> <i></i> 99: 2 551-555<br/>

http://publicationslist.org/mark.crowe/refid60 2011-06-14T15:17:50Z

To determine whether systemic and/or intraovarian concentrations of insulin-like growth factor-I (IGF-I) are affected by short-term fasting, 24 heifers were blocked by weight and, within block, were assigned to one of three treatments: fasted for 0 h (controls; n = 8), fasted for 24 h (n = 8), or fasted for 48 h (n = 8). Blood plasma was collected every 8 h from -64 h to 0 h before ovariectomy (OV...<br/><br/>L J Spicer, M A Crowe, D J Prendiville, D Goulding, W J Enright (1992) <i>Biol Reprod</i> <i></i> <i></i> 46: 5 920-925<br/>

http://publicationslist.org/mark.crowe/refid61 2011-06-14T15:17:50Z

Friesian x Hereford heifers (n = 19; mean +/- s.e.m. body weight (BW) = 375 +/- 5 kg) were used in a randomized incomplete block design. Heifers were fed 0.7 (n = 7; L), 1.1 (n = 7; M) or 1.8% (n = 5; G) of BW in dry matter (DM)/day for 10 weeks. Ovaries were examined by ultrasound, for one oestrous cycle, from week 5 of treatment. Maximum diameter of dominant follicles was smaller (P less than 0....<br/><br/>M G Murphy, W J Enright, M A Crowe, K McConnell, L J Spicer, M P Boland, J F Roche (1991) <i>J Reprod Fertil</i> <i></i> <i></i> 92: 2 333-338<br/>