Fetal Development: Week 20
20 weeks after conception (5 months)
(22 weeks after the last menstrual period)
The fetus is the length of a banana or about 7 ½ inches (7.5 inches) long from crown to rump (head to butt) (head to butt) and weighs just under a pound (14 to 16 oz.). The fetus has fine downy hair, called lanugo, on its body. The eyelashes, eyebrows and hair on the head are showing.
An average banana measures between 7 and 8 inches.