Reproductive System, part 4 – Pregnancy & Development: Crash Course A&P #43

We’ve reached the grand finale of our four part series on human reproduction: BABIES! Today Hank walks you through the stages of pregnancy, beginning with how a zygote develops into blastomeres to a morula to a blastocyst and finally to an embryo and a fetus. He also explains some of the amazing anatomical changes that take place in the mother, and the hormonal sequence of events that lead to labor.

A&P poster:

Listen beautiful relax classics on our Youtube channel.

Table of Contents
Stages of Pregnancy 1:23
Zygote — Blastomere 1:34
Morula — Blastocyst 2:12
Embryo — Fetus 5:07
Anatomical Changes 5:30
Hormonal Sequences Leading to Labor 7:12


Crash Course is on Patreon! You can support us directly by signing up at

Thanks to the following Patrons for their generous monthly contributions that help keep Crash Course free for everyone forever:

Mark, Eric Kitchen, Jessica Wode, Jeffrey Thompson, Steve Marshall, Moritz Schmidt, Robert Kunz, Tim Curwick, Jason A Saslow, SR Foxley, Elliot Beter, Jacob Ash, Christian, Jan Schmid, Jirat, Christy Huddleston, Daniel Baulig, Chris Peters, Anna-Ester Volozh, Ian Dundore, Caleb Weeks

Want to find Crash Course elsewhere on the internet?
Facebook –
Twitter –
Tumblr –
Support Crash Course on Patreon:

CC Kids:

Rating Reproductive System, part 4 – Pregnancy & Development: Crash Course A&P #43 is 5.0 / 5 Votes: 5
Please wait...