The relationship between periovulatory endocrine and follicular activity on corpus luteum size, function, and subsequent embryo survival

Theriogenology
C O LynchM G Diskin

Abstract

The objectives of this study were to examine the relationships between periovulatory endocrine events, ovarian activity, and embryo survival after artificial insemination (AI) in cattle (Bos taurus). Eighty-four reproductively normal beef heifers were estrus synchronized using a prostaglandin-based regimen. Artificial insemination was performed between 5 and 21h after heat onset. Ultrasonic examination of ovarian structures began 12h after the onset of heat and continued every 6h until confirmed ovulation. Blood samples were collected for measurement of estradiol, progesterone, and insulin-like growth factor-1 (IGF-1). Pregnancy diagnosis was conducted on Days 30 and 100 after AI. Embryo survival was defined as the presence of an embryo with a detectable heartbeat in a clear amniotic sac at Day 30 postinsemination. There was no effect of the intervals from the onset of heat to AI or ovulation or from AI to ovulation on embryo survival (P>0.10). There was a tendency (P=0.09) of an inverse relationship between preovulatory follicle size and embryo survival that was unrelated to concentrations of estradiol or IGF-1 during the periovulatory period (P>0.05). There was evidence (P=0.08) of a positive association between embryo surviv...Continue Reading

References

Jul 1, 1995·Domestic Animal Endocrinology·L J Spicer, S E Echternkamp
Mar 4, 2000·Animal Reproduction Science·L D DunneJ M Sreenan
May 4, 2002·Animal Reproduction Science·V SilkeJ M Sreenan
Dec 8, 2004·Animal Reproduction Science·J Saumande, P Humblot
Mar 30, 2005·Proceedings of the National Academy of Sciences of the United States of America·George A PerryThomas W Geary
Jul 25, 2008·Reproduction in Domestic Animals = Zuchthygiene·M G Diskin, D G Morris
May 14, 2014·Journal of Dairy Science·J S StevensonJ M DeJarnette

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Citations

Aug 21, 2010·Reproduction : the Official Journal of the Society for the Study of Fertility·Mourad AssidiMarc-André Sirard
Apr 8, 2014·Animal : an International Journal of Animal Bioscience·M G Diskin, D A Kenny
Oct 1, 2011·Theriogenology·M C WiltbankA Gumen
May 18, 2016·Theriogenology·M G Diskin, D A Kenny
May 3, 2018·Animal : an International Journal of Animal Bioscience·M G Diskin
Aug 28, 2021·Animals : an Open Access Journal From MDPI·Isfendiyar DarbazSelim Aslan

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