The results of in vitro fertilization depend on a huge number of factors, but it is the embryological stage of the procedure that has the most important, practically determining result, value.
The first day
Immediately after fertilization, the doctor checks for signs that the ICSI, IMSI or IVF procedure is successful. To do this, it looks like pronuclei look and evaluates them:
At this stage of embryo development, a variety of pathologies can form that lead to their death.
Bad embryos are immediately discarded. It makes no sense to implant them. Even if they do not die at the stage of cultivation, the woman’s body itself rejects such embryos. As a result, if the pregnancy occurs, it is very quickly interrupted. This happens in the first weeks of gestation.