In CVS, specialists perform an ultrasound to determine ... a baby's heart rate can vary between 120 and 170 beats per minute. In the third trimester, obstetricians may use a variation of this ...

In high-risk pregnancies, an ultrasound to check the growth ... Patients should carefully monitor fetal movement during the third trimester. There are many different ways to do fetal kick counts ...

Allie, a 37-year-old bottlenose dolphin, has entered her third trimester of a 12-month pregnancy. She is expected to give birth in June.