Back to Definitions


The inner layer, or cell mass, of the blastocyst (definition link). This goes on to become the amnion (definition link), umbilical cord (definition link), and the embryo.

We would love you to join our community.

Receive a free Hospital Bag Checklist when you sign up to the newsletter

Please select one of the options below

/ /
/ /
We use cookies and similar technologies to enable services and functionality on our site and to understand your interaction with our service. By clicking on accept, you agree to our use of such technologies for marketing and analytics.