4h 53min, apr 3, 2002 y - Implantation
Description:
The zygote ends up in the uterus. While this is happening, the zygote begins to split into a cluster of cells. This is called a morula. As it rapidly divides into more cells, it becomes known as a blastocyst and implants itself into the endometrium, or uterine lining. The inner cells in the blastocyst will become the embryo, and the outer cells will become the placenta.Added to timeline:
Date:
4h 53min, apr 3, 2002 y
Now
~ 23 years ago