Reproductive Disorder Clinical Trial
Official title:
Do the Morphokinetic Parameters of Early Embryonic Development Have an Interest in the Choice of the Embryo to be Transferred and Improve Birth Rates in Vitro Fertilization
In France, nearly 3% of children are conceived by the technique of Assisted Reproductive
Medicine, of which nearly 70% by in vitro fertilization (IVF). The rates of clinical
pregnancy by oocyte retrieval or embryo transfer have not changed much. The use of
mono-embryo transfer reduces the risk of multiple pregnancies and associated obstetric
complications. The choice of embryo to transfer or freeze is a key element in improving the
chances of success of IVF. It is usually based on conventional morphological criteria
(reference method) that are punctual, qualitative and subjective. However, embryo morphology
at early stages has little predictive value for obtaining a late-stage embryo and its chances
of implantation. The recent use of time-lapse technology during embryonic culture makes it
possible to associate morphological criteria with continuous monitoring of the kinetics of
embryonic development. The choice of the embryo to be transferred is then made according to
morphokinetic criteria (conventional morphological criteria to which are added the data of
the kinetics of embryonic development).
Two recent retrospective studies give contradictory results, the first shows higher birth
rates in the group of embryos selected according to conventional morphological criteria, the
second concludes that morphokinetic analysis is superior. Morphokinetic criteria would also
be more objective and reproducible. However, the use of morphokinetic parameters remains
controversial in the literature.
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