Types

Twins and Premature Birth

Most births of single babies happen at 39 weeks. But the average length of a twin pregnancy is 35 weeks.

Babies with low birth weight tend to weigh less than 5 pounds. This increases their risk for many major health problems.

Some problems are brief, such as:

  • Jaundice

  • Anemia

  • Trouble breathing

  • Staying warm

Others have lasting effects, such as:

  • Constant respiratory problems

  • Intellectual disability

  • Cerebral palsy

  • Vision and hearing loss

  • Feeding problems

To lower the chance of early births, women who are pregnant with twins usually see their healthcare providers more often. They are watched for signs of preterm labor. Their healthcare providers may treat preterm labor with bed rest and medicines to stop contractions. Near the 20th week of pregnancy, healthcare providers may recommend regular ultrasounds to check the growth rate of the twins to make sure they are growing at about the same rate. During the third trimester, the healthcare provider may suggest a non-stress test or a biophysical profile (non-stress test with an ultrasound). This will check the well-being of the twins.

If you're carrying twins, closely follow your healthcare provider's advice about diet, exercise, and rest. Stay away from harmful things, such as tobacco smoke and alcohol. Prenatal care is important. Make sure you keep all your prenatal appointments. Learn the symptoms and signs of preterm labor, and what to do if you have them. Do all you can to reduce your risk of having your babies too soon.

Featured in

Author: Nelson, Melissa

© 2000-2026 The StayWell Company, LLC. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.

Find the right providers for your needs.

CalOptima Health works with thousands of Orange County providers, including doctors, specialists, health networks, medical groups and more.

Find a Doctor

See Member Health Rewards

CalOptima Health offers health rewards to eligible CalOptima Health members who take an active role in their well-being!

View available rewards
Related Articles
Read article
OB/GYN
What Is Prenatal Care?

Before becoming pregnant, you may have adopted good health habits to get ready for your baby. But if you didn't, start today. Read on to learn more.

Read article
OB/GYN
Planning a Pregnancy

Planning ahead and taking care of yourself before becoming pregnant is the best thing you can do for you and your baby.

Read article
Wellness
International Travel While Pregnant or Breastfeeding

Detailed information on traveling while pregnant or breastfeeding.

Read article
Breast Health
Breastfeeding FAQs

Here are answers to some common questions about breastfeeding.