Pregnancy rates and metabolic profiles in cattle treated with propylene glycol prior to embryo transfer

Theriogenology
Carlos Olegario HidalgoCarmen Díez

Abstract

The objective of this study was to determine the effect of a sustained propylene glycol administration to recipients of frozen/thawed in vivo derived bovine embryos. Heifers were treated with oral propylene glycol for the last 20 days before embryo transfer (n = 142), and untreated as controls (n = 133). Progesterone, insulin, insulin-like growth factor-I, glucose, urea and triglyceride were analysed in blood on Day 0 and Day 7 of the estrous cycle corresponding to embryo transfer. The heifers were selected as recipients when showing progesterone levels <2.0 ng/ml (Day 0) and >2.5 ng/ml (Day 7), according to corpus luteum quality on Day 7 by technicians unaware of animals treated. Within treated animals, significantly more recipients were selected, and increased progesterone, corpus luteum quality, pregnancy and calving rates were recorded. Day 7 progesterone concentrations were higher in heifers treated and transferred. Propylene glycol increased insulin and insulin-like-growth factor-I, but glucose, urea and triglyceride did not vary. Furthermore, insulin-like-growth factor-I, glucose and triglyceride increased at estrous time, but urea decreased and insulin remained unaltered. Together with the sustained gain in pregnancy ra...Continue Reading

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Citations

Apr 9, 2014·Reproduction, Fertility, and Development·B TrigalE Gómez
Nov 13, 2012·Animal Reproduction Science·Jane VaughanThomas Wittek
Aug 16, 2008·Domestic Animal Endocrinology·M A VelazquezD C Wathes
Oct 16, 2014·Zygote : the Biology of Gametes and Early Embryos·Bartosz KempistyMaciej Zabel
Jan 30, 2008·Reproduction in Domestic Animals = Zuchthygiene·J ScherzerG L Heusner
Apr 7, 2016·Reproduction, Fertility, and Development·A Murillo-RíosE Gómez
May 18, 2020·Animal Reproduction Science·J A Sauls-HiestermanJ S Stevenson
Dec 14, 2011·Journal of Proteome Research·Marta MuñozEnrique Gómez

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