hCG is a hormone produced very early by the embryo, but not by the oocyte. It has a pivotal role in the trophoblast differentiation, and embryo implantation as well as the corpus luteum support. In spite of its well-known role, the literature about it is scarce. The aim of this retrospective study is to evaluate the relationship between the hCG concentration in peripheral maternal blood measured 11 days after embryo transfer, embryo morphokinetics pattern and the abortion and ongoing pregnancy rates. We will study patients having transference of blastocyst cultured in time lapse monitored incubators and will check all the morphokinetics parameters with the IVI database.
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Researchers pretend to correlate the quality of the trophoectoderm and the embryo morphokinetics time with the hCG concentration after 13 days of embryo transfer, and also the implantation and the ongoing pregnancy rate.
Timeframe: Since 2013 to april 2019