Maternal Serum Progesterone Concentration and Early Conceptus Development of Bovine Embryos Produced In Vivo or In Vitro

The objective of this study was to examine the relationship between recipient serum concentrations of progesterone, at the time of embryo transfer and at conceptus recovery, on conceptus development from in vivo- or in vitro-produced embryos. Embryos were produced in vivo by superovulation of Holstein cows (IVO; n = 17) or in vitro with either serum-containing (IVPS; n = 27) or serum-restricted medium (IVPSR; n = 34). Single Grade 1 blastocysts from each embryo production system were transferred into heifers on Day 7 of development.

Source: Domestic Animal Endocrinology - March 26, 2015 Category: Endocrinology Authors: C.V. Barnwell, P.W. Farin, C.S. Whisnant, J.E. Alexander, C.E. Farin Source Type: research