Updated: Nov 22, 2022
What is a healthy heart rate for twins?
Early in your pregnancy, the babies’ heartbeats will start slow, averaging about 110 BPM. By week 9, this rate increases to 150 to 170 BPM, or about twice as fast as yours. Fetal heart rate peaks at 9 weeks and will gradually decrease over your pregnancy, averaging 110 to 160 BPM. Keep in mind that fetal heart rate can vary by 5 to 25 BPM and a number of things can impact their heart rate at any given time. This includes maternal causes such as stress, food, and caffeine intake as well as thyroid problems. The babies’ movements and positioning can also influence their heart rates.
A healthy heart rate is a good indicator of a healthy pregnancy, with some research suggesting that an abnormal heart rate can indicate a potentially poor prognosis. One study found that for identical twins, a difference of 20 BPM or more between the babies may be a marker for developing Twin-to-Twin Transfusion Syndrome later in pregnancy. Try not to stress, though. Your doctor knows what to look for and will help you understand any potential complications.