Week 2 is often referred to as the week of twos. It's the week when the embryoblast, extraembryonic mesoderm and trophoblast each separate into two distinct layers. Additionally, there are two cavities that develop within the embryonic unit at this time as well. The following questions would be answered in this video:
What happens in the second week of embryonic development?
What are the 4 stages of embryonic development?
What is the fertilized egg called after about 2 weeks of development?
What are the 5 stages of embryonic development?
How long does it take for a blastocyst to implant?
Where does blastocyst implant in uterus?
What happens in the blastocyst stage?
What helps blastocyst implantation?
