3h 28min, nov 25, 2002 y - Second Trimester Begins
Description:
Week 13 marks the beginning of the second trimester. When the second trimester begins the placenta is already fully developed. During this trimester the placenta grows to suit the growing fetus.
Added to timeline:
Growth and Development Timeline, Jacky Villanueva
Neil Izenberg, Pregnancy Chart. KidsHealth.org, accessed fro...
Date:
Images:
![]()
