Week 20

The fetus measures about 5.6 to 6.4 inches (~15 cm) from crown to rump and weighs about 9 ounces (~250 g). Your baby can hear sounds by now -- your voice, heart and your stomach growling, as well as sounds outside your body. It will cover its ears with its hands if a loud sound is made near you, and it may even become startled and "jump." The baby is moving often, too -- twisting, turning, wiggling, punching and kicking.