Changes in reproductive physiology of lactating dairy cows due to elevated steroid metabolism.

[1]  Y. Folman,et al.  The relationship between plasma progesterone concentration and conception in post-partum dairy cows maintained on two levels of nutrition. , 1973, Journal of reproduction and fertility.

[2]  F. A. Fonseca,et al.  Reproductive traits of Holsteins and Jerseys. Effects of age, milk yield, and clinical abnormalities on involution of cervix and uterus, ovulation, estrous cycles, detection of estrus, conception rate, and days open. , 1983, Journal of dairy science.

[3]  M. Faust,et al.  Environmental and Yield Effects on Reproduction in Primiparous Holsteins , 1988 .

[4]  R. Grummer,et al.  A review of lipoprotein cholesterol metabolism: importance to ovarian function. , 1988, Journal of animal science.

[5]  S. Ford,et al.  Effects of lactational level on reactivation of ovarian function, and interval from parturition to first visual oestrus and conception in high-producing holstein cows , 1989 .

[6]  W. Thatcher,et al.  Relationship between ovarian activity and energy status during the early postpartum period of high producing dairy cows. , 1990, Journal of dairy science.

[7]  M. Boland,et al.  Resumption of follicular activity in the early post-partum period of dairy cows. , 1990, Journal of reproduction and fertility.

[8]  J. Young,et al.  Increased milk production versus reproductive and energy status of high producing dairy cows. , 1990, Journal of dairy science.

[9]  G. Shook,et al.  Reproductive performance in genetic lines selected for high or average milk yield. , 1991, Journal of dairy science.

[10]  M. Boland,et al.  Frequency of twin births among Holstein-Friesian cows in a warm dry climate. , 1991, Theriogenology.

[11]  R. Parr,et al.  Feed intake affects metabolic clearance rate of progesterone in sheep. , 1993, Research in veterinary science.

[12]  R. Parr,et al.  Liver blood flow and metabolic clearance rate of progesterone in sheep. , 1993, Research in veterinary science.

[13]  M. Wiltbank,et al.  Synchronization of ovulation in dairy cows using PGF2α and GnRH , 1995 .

[14]  N. Ahmad,et al.  Effect of persistent follicles on early embryonic losses in beef cows. , 1995, Biology of reproduction.

[15]  S. McDougall,et al.  Patterns of follicular development during periods of anovulation in pasture-fed dairy cows after calving. , 1995, Research in veterinary science.

[16]  W. R. Butler,et al.  Prolonged dominance of follicles and reduced viability of bovine oocytes. , 1996, Journal of reproduction and fertility.

[17]  J. Ferguson.  Diet, production and reproduction in dairy cows , 1996 .

[18]  W. R. Butler,et al.  Relationship of fertility to patterns of ovarian follicular development and associated hormonal profiles in dairy cows and heifers. Cooperative Regional Research Project. , 1996, Journal of animal science.

[19]  O. J. Ginther,et al.  Relationships between FSH and ovarian follicular waves during the last six months of pregnancy in cattle. , 1996, Journal of reproduction and fertility.

[20]  M. Kosorok,et al.  Reproductive management of lactating dairy cows using synchronization of ovulation. , 1997, Journal of dairy science.

[21]  M. Wiltbank,et al.  Pregnancy rates per artificial insemination for cows and heifers inseminated at a synchronized ovulation or synchronized estrus. , 1997, Journal of dairy science.

[22]  W. R. Butler,et al.  Energy balance and ovarian follicle development prior to the first ovulation postpartum in dairy cows receiving three levels of dietary fat. , 1997, Biology of reproduction.

[23]  A. Kruif,et al.  An Analysis of Ovarian Dysfunction in High Yielding Dairy Cows After Calving Based on Progesterone Profiles , 1998 .

[24]  A. O. Darwash,et al.  The use of milk progesterone profiles to characterise components of subfertility in milked dairy cows. , 1998, Animal reproduction science.

[25]  W. Marsh,et al.  Risk factors for twinning in dairy cows. , 1998, Journal of dairy science.

[26]  M. Wiltbank,et al.  Effect of milk production on the incidence of double ovulation in dairy cows. , 1999, Theriogenology.

[27]  Z. Xu,et al.  Reproductive performance of dairy heifers after estrus synchronization and fixed-time artificial insemination. , 1999, Journal of dairy science.

[28]  M. Diskin,et al.  The effect of pre- and post-insemination plane of nutrition on embryo survival in beef heifers , 1999 .

[29]  L B Hansen,et al.  Consequences of selection for milk yield from a geneticist's viewpoint. , 2000, Journal of dairy science.

[30]  John Woolliams,et al.  Declining fertility in dairy cattle: changes in traditional and endocrine parameters of fertility. , 2000 .

[31]  J. Roche,et al.  Reproductive management of postpartum cows. , 2000, Animal reproduction science.

[32]  M. Wiltbank,et al.  Mechanisms that prevent and produce double ovulations in dairy cattle. , 2000, Journal of dairy science.

[33]  M. Lucy.  Regulation of ovarian follicular growth by somatotropin and insulin-like growth factors in cattle. , 2000, Journal of dairy science.

[34]  Y T Gröhn,et al.  Epidemiology of reproductive performance in dairy cows. , 2000, Animal reproduction science.

[35]  F. Schwarzenberger,et al.  The effect of level of feed intake on progesterone clearance rate by measuring faecal progesterone metabolites in grazing dairy cows. , 2001, Animal reproduction science.

[36]  W. Butler.  Nutritional effects on resumption of ovarian cyclicity and conception rate in postpartum dairy cows , 2001 .

[37]  F. Schwarzenberger,et al.  Excretion rate of progesterone in milk and faeces in lactating dairy cows with two levels of milk yield. , 2001, Reproduction, nutrition, development.

[38]  M. Lucy,et al.  Reproductive loss in high-producing dairy cattle: where will it end? , 2001, Journal of dairy science.

[39]  C. Risco,et al.  Effects of presynchronization and bovine somatotropin on pregnancy rates to a timed artificial insemination protocol in lactating dairy cows. , 2001, Journal of dairy science.

[40]  G. Mann,et al.  Relationship between maternal endocrine environment, early embryo development and inhibition of the luteolytic mechanism in cows. , 2001, Reproduction.

[41]  M. Wiltbank,et al.  Fertilization and early embryonic development in heifers and lactating cows in summer and lactating and dry cows in winter. , 2002, Journal of dairy science.

[42]  M. Wiltbank,et al.  Extending the postpartum anovulatory period in dairy cattle with estradiol cypionate. , 2002, Journal of dairy science.

[43]  M. Wiltbank,et al.  Physiological classification of anovulatory conditions in cattle. , 2002, Theriogenology.

[44]  M. Wiltbank,et al.  Ovarian structures and circulating steroids in heifers and lactating cows in summer and lactating and dry cows in winter. , 2002, Journal of dairy science.

[45]  M. Wiltbank,et al.  An Alteration in the Hypothalamic Action of Estradiol Due to Lack of Progesterone Exposure Can Cause Follicular Cysts in Cattle1 , 2002, Biology of reproduction.

[46]  R. Webb,et al.  Effect of dietary-induced increases in circulating insulin concentrations during the early postpartum period on reproductive function in dairy cows. , 2002, Reproduction.

[47]  O. Szenci,et al.  The relationship between estrous behavioral score and time of ovulation in dairy cattle. , 2002, Journal of dairy science.

[48]  M. Wiltbank,et al.  High feed intake increases liver blood flow and metabolism of progesterone and estradiol-17beta in dairy cattle. , 2002, Journal of dairy science.

[49]  S. Washburn,et al.  Trends in reproductive performance in Southeastern Holstein and Jersey DHI herds. , 2002, Journal of dairy science.

[50]  M. W. Peters,et al.  Fertility of lactating dairy cows treated with Ovsynch after presynchronization injections of PGF2 alpha and GnRH. , 2002, Journal of dairy science.

[51]  M. Wiltbank,et al.  Follicular size and response to Ovsynch versus detection of estrus in anovular and ovular lactating dairy cows. , 2003, Journal of dairy science.

[52]  M. Wiltbank,et al.  Acute reduction in serum progesterone concentrations after feed intake in dairy cows. , 2003, Theriogenology.

[53]  F. López-Gatius.  Is fertility declining in dairy cattle? A retrospective study in northeastern Spain. , 2003, Theriogenology.

[54]  Z. Roth,et al.  Follicular dynamics and concentrations of steroids and gonadotropins in lactating cows and nulliparous heifers. , 2004, Theriogenology.

[55]  M. Wiltbank,et al.  Relationship between level of milk production and estrous behavior of lactating dairy cows. , 2004, Animal reproduction science.

[56]  J. Santos,et al.  The effect of embryonic death rates in cattle on the efficacy of estrus synchronization programs. , 2004, Animal reproduction science.

[57]  R. Chebel,et al.  Effect of bST and reproductive management on reproductive performance of Holstein dairy cows. , 2004, Journal of dairy science.

[58]  F. López-Gatius,et al.  Recent developments in oestrous synchronization of postpartum dairy cows with and without ovarian disorders. , 2004, Reproduction in domestic animals = Zuchthygiene.

[59]  M. Wiltbank,et al.  Comparison of ovarian function and circulating steroids in estrous cycles of Holstein heifers and lactating cows. , 2004, Journal of dairy science.

[60]  H. Lopez,et al.  Reproductive Hormones and Follicular Growth During Development of One or Multiple Dominant Follicles in Cattle1 , 2005, Biology of reproduction.

[61]  M. Wiltbank,et al.  Relationship between level of milk production and multiple ovulations in lactating dairy cows. , 2005, Journal of dairy science.