Time for an Ultrasound
An ultrasound is usually done for all pregnant women at 20 weeks. During this ultrasound, the doctor will make sure that the placenta is healthy and attached normally and that your baby is growing properly. You can see the baby's heartbeat and movement of its body, arms, and legs on the ultrasound. You can usually find out whether it's a boy or a girl at 20 weeks.
Shown here is a 2D ultrasound (inset) contrasted with a 4D ultrasound, both at 20 weeks.