Fetal Development Guide: Heartbeat, Size & Trimester Tips

Fetal growth follows a precise timeline, from the first heartbeat to the final stages of brain development. Proper nutrition delivered through the placenta is vital for maintaining healthy fetal weight and overall wellness.

Problems During the First Trimester of Pregnancy

Published Jun,13 2017 | By Susan T. McClure

The first trimester of pregnancy lasts from fertilization to the 13th week. During this time the embryo will implant, form the fetal part of the placenta and develop all its organs. Your body will pump out hormones and produce more blood cells to support the pregnancy.