Morphokinetic parameters as auxiliary criteria for selection of blastocysts cultivated in a time-lapse monitoring system

To describe embryonic profile up to blastocyst stage in a time-lapse system. A retrospective, longitudinal, analytical study of patients submitted to in vitro fertilization. The embryos were grouped according to the degree of expansion, internal cell mass and trophectoderm classification, the morphokinetic parameters were associated with the time periods stated in each evolution phase. The appearance of a second polar corpuscle (CPap) occurred earlier in the embryos classified as excellent (2.99h; p