Concept
Version 6
Created by Boundless
Human Gestation
Second trimester
This fetus is just entering the second trimester, when the placenta takes over more of the functions performed as the baby develops.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"OpenStax College, Human Pregnancy and Birth. October 17, 2013."
http://cnx.org/content/m44848/latest/Figure_43_07_03.jpg
OpenStax CNX
CC BY 3.0.