Physiological and practical effects of progesterone on reproduction in dairy cattle
MC Wiltbank, AH Souza, PD Carvalho, AP Cunha… - Animal, 2014 - cambridge.org
The discovery of progesterone (P4) and elucidation of the mechanisms of P4 action have an
important place in the history of endocrinology and reproduction. Circulating P4 …
important place in the history of endocrinology and reproduction. Circulating P4 …
Changes in reproductive physiology of lactating dairy cows due to elevated steroid metabolism
M Wiltbank, H Lopez, R Sartori, S Sangsritavong… - Theriogenology, 2006 - Elsevier
This manuscript focuses on potential changes in reproductive physiology that occur due to
high milk production in lactating dairy cows. Four reproductive measures are discussed …
high milk production in lactating dairy cows. Four reproductive measures are discussed …
The cow as an induced ovulator: Timed AI after synchronization of ovulation
MC Wiltbank, JR Pursley - Theriogenology, 2014 - Elsevier
Timed-AI after synchronization of ovulation has become one of the most used reproductive
technologies developed during the past 40 years. Various adaptations of this technology are …
technologies developed during the past 40 years. Various adaptations of this technology are …
[HTML][HTML] Factors affecting expression of estrus measured by activity monitors and conception risk of lactating dairy cows
AML Madureira, BF Silper, TA Burnett, L Polsky… - Journal of Dairy …, 2015 - Elsevier
The objective of this study was to determine risk-factors affecting increase in physical activity
during estrus and pregnancy per artificial insemination (P/AI) in lactating dairy cows. Cows …
during estrus and pregnancy per artificial insemination (P/AI) in lactating dairy cows. Cows …
Reduced fertility in High‐yielding dairy cows: Are the oocyte and embryo in danger? Part I the importance of negative energy balance and altered corpus luteum …
J Leroy, G Opsomer, A Van Soom… - … in domestic animals, 2008 - Wiley Online Library
Contents Fertility in high yielding dairy cows is declining, and there is increasing evidence to
presume that oocyte and embryo quality are major factors in the complex pathogenesis of …
presume that oocyte and embryo quality are major factors in the complex pathogenesis of …
[HTML][HTML] Expression of estrus improves fertility and decreases pregnancy losses in lactating dairy cows that receive artificial insemination or embryo transfer
MHC Pereira, MC Wiltbank, JLM Vasconcelos - Journal of dairy science, 2016 - Elsevier
The objective was to evaluate if expression of estrus by dairy cattle altered fertility in timed
artificial insemination (AI; n= 5,430) or timed embryo transfer (ET; n= 2,003) programs that …
artificial insemination (AI; n= 5,430) or timed embryo transfer (ET; n= 2,003) programs that …
Reduced fertility in high‐yielding dairy cows: are the oocyte and embryo in danger? Part II mechanisms linking nutrition and reduced oocyte and embryo quality in …
J Leroy, A Van Soom, G Opsomer… - … in domestic animals, 2008 - Wiley Online Library
Contents Dairy cow fertility has been declining during since the mid‐80s and this has given
rise to numerous scientific studies in which important parts of the pathogenesis are …
rise to numerous scientific studies in which important parts of the pathogenesis are …
Reproductive cycles in Bos indicus cattle
R Sartori, CM Barros - Animal reproduction science, 2011 - Elsevier
Several studies using transrectal ovarian ultrasonic scanning in Bos taurus (B. taurus) cattle
and more recently in Bos indicus (B. Indicus) females evaluated the reproductive cycles of …
and more recently in Bos indicus (B. Indicus) females evaluated the reproductive cycles of …
Metabolic and endocrine differences between Bos taurus and Bos indicus females that impact the interaction of nutrition with reproduction
During the last decade, researchers have studied the differences in the reproductive
physiology between Bos taurus and Bos indicus breeds. This manuscript focuses on the …
physiology between Bos taurus and Bos indicus breeds. This manuscript focuses on the …
[HTML][HTML] Factors affecting conception rates following artificial insemination or embryo transfer in lactating Holstein cows
DGB Demetrio, RM Santos, CGB Demetrio… - Journal of Dairy …, 2007 - Elsevier
The objective of this study was to evaluate the factors that may affect conception rates (CR)
following artificial insemination (AI) or embryo transfer (ET) in lactating Holstein cows …
following artificial insemination (AI) or embryo transfer (ET) in lactating Holstein cows …