Title: Fetal Development Week by Week | Pampers
Headings: Fetal Development Week by Week
Fetal Development Week by Week
Stages of Fetal Development Week by Week
First Trimester
Second Trimester
Third Trimester

Content: Week 18
Fine hair known as lanugo begins to cover that little body. The fetus may wake from sleep in response to your movements. Your little one is about the size of a sweet potato. Week 19
Kicks and movements may be getting stronger. Ovaries have developed in girls and testes have formed in boys. The fetus may be able to (adorably) suck a thumb. Your little one is about the size of a mango. Week 20
Some facial features and external genitals may be visible via ultrasound. Your baby is producing meconium, which is the waste that will become his first poop after birth. His fingernails are growing.