Once it reaches the uterus, the morula becomes a blastocyst. The blastocyst then burrows into the uterine lining a process identified as implantation. Find out more about the possible signals and signs and symptoms of implantation for the duration of pregnancy, moreover when and why it happens. There's a issue https://dralpersismanoglu.com/en/is-normal-pregnancy-possible-after-ivf/