There are two main reasons for this. First of all, it is possible that the endometrial preparation does not go well and the adequate thickness is not achieved after weeks of hormonal medication. On the other hand, it can also happen that the vitrified embryos do not survive after thawing, although this is not usually the case. The survival rate of vitrified embryos is close to 99%.
Read the full article on: Why do in vitro fertilization cycles sometimes get cancelled? ( 40).
Bachelor's Degree in Biotechnology from the Technical University of Valencia (UPV). Biotechnology Degree from the National University of Ireland en Galway (NUIG) and embryologist specializing in Assisted Reproduction, with a Master's Degree in Biotechnology of Human Reproduction from the University of Valencia (UV) and the Valencian Infertility Institute (IVI)