The Recipient's Day After Ovulation and the Number of Corpora Lutea Influence the Likelihood of Pregnancy in Mares Following Transfer of ICSI Frozen Embryos

作者: Juan Cuervo-Arango , Anthony N. Claes , Tom A. Stout

DOI: 10.1016/J.THERIOGENOLOGY.2019.06.020

关键词:

摘要: Asynchronous embryo transfer is an excellent tool to investigate how subtle differences in the uterine environment affect development and survival. Progesterone secreted from corpus luteum following ovulation one of main factors responsible for establishing endometrial receptivity pre-implantation via complex alterations expression genes involved secretion histotroph. The objective this retrospective study was determine whether recipient's Day after number CL at ET influence pregnancy rates IVP horse embryos. included 650 heterologous frozen ICSI cycles evaluated ongoing rate. significantly lower recipient mares with performed 5 6 days (47.4% 37.5%, respectively) than recipients 4 (67.3%). Furthermore, (Day 0 = Day ovulation) 2 corpora lutea (CL) time had rate (36.1%) 1 (51.9%). In contrast, presence associated a higher (75.8%) less advanced stage 3 ovulation), compared only (62.7%). conclusion, both recorded mare influenced clinical This highlights importance exactly when progesterone rises above threshold (relative trying optimal window transferring IVF/IVP embryo.

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