While the egg is developing, other changes are taking place in the uterus. it develops a thick lining that is full of what?
amniotic fluid
large arteries
white blood cells
tiny blood vessels
While the egg is developing, other changes are taking place in the uterus. It develops a thick lining that is full of tiny blood vessels. The lining prepares the uterus to receive a fertilized egg if fertilization actually takes place.