Reproductive System, Part 4: Pregnancy & Development 
Reproductive System, Part 4: Pregnancy & Development
by Crash Course
Video Lecture 43 of 47
Not yet rated
Views: 1,157
Date Added: August 11, 2016

Lecture Description

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:

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:

Course Index

Course Description

In this Crash Course series, Hank Green teaches most of what you should know about anatomy and physiology, perfect for a freshman-level biology course, or just your own curiosity about the human body.


There are no comments. Be the first to post one.
  Post comment as a guest user.
Click to login or register:
Your name:
Your email:
(will not appear)
Your comment:
(max. 1000 characters)
Are you human? (Sorry)