Twins and Premature Birth

Most births of single babies occur at 39 weeks. But, the average length of a twin pregnancy is 36 weeks. About 50 percent of twins are born preterm, or earlier than 37 weeks.

"Preemies" tend to weigh less than 5.5 pounds, according to the March of Dimes. This increases their risk for many significant health problems. Some may be temporary, such as jaundice, anemia, and difficulty breathing. Others have lasting effects, such as persistent respiratory problems, and vision and hearing loss.

To lower the chance of early births, women who are pregnant with twins typically see their doctors more often. They also are monitored for signs of preterm labor. Their doctors may treat preterm labor with bed rest and medications to stop contractions. And, they may advise mothers to start being less physically active sometime between weeks 20 and 30, even if there are no signs of problems.

If you're carrying twins, closely follow your doctor's guidance about diet, exercise, and rest, and avoid harmful substances such as tobacco smoke and alcohol. And, prenatal care is important. Make sure you keep all your doctor's appointments. Learn the symptoms and signs of preterm labor and know what to do if you experience them. Do all you can to lessen your risk of having your babies too soon.