37 Weeks Pregnant with Twins

Here’s what to expect when you are 37 weeks pregnant with twins:

Fetal Development

By 37 weeks in the twin pregnancy each of your twins may be well over 18″-19″ (46 cm) long and average the following measurements:

Head circumference: 13.25″ (337 mm)
Abdominal Circumference: 13″ (330 mm)
Femur Bone Length (about from the waist to knee): 2.75″ (70 mm)

Each baby is about the length of a stalk of Swiss chard.

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What to Expect

Typical weight gain for Mom at this point is about one pound per week (0.6kg).

(RELATED: Check out the Dad's Guide to Twins Youtube channel for additional helpful twin tips and tricks videos.)

Total weight gain for the twin pregnancy so far will average between 38 to 54 pounds (17.2 to 24.5kg).

Allison S. – “I’ll be officially 37 weeks tomorrow and the babies are scheduled to come as well! C section due to baby B being breech most of the pregnancy, since I have gestational diabetes, and since Baby B is bigger and to prevent her getting stuck. I’m very nervous, but excited the day has finally arrived!”

Pictures and Video

Here’s an ultrasound video of what you might see at 37 weeks pregnant with twins:

Belly Picture at 37 weeks:
37 Weeks Pregnant with Twins Belly
Picture by Gregory Katsoulis

If Your Twins Were Born This Week

Your twins are considered to term. They are typically born as healthy as their singleton counterparts. Twins born during the 37th week average a hospital stay of about 6 days and normally go home with Mom when she leaves the hospital.

Most twin parents report no NICU time for their twins born this week:

(RELATED: Love podcasts? Check out the entire Dad's Guide to Twins Podcast archive for additional twin tips and interviews with twin dads.)

Matt B.: No NICU. Born 37 weeks and weighing 6 lbs even, 5 lbs 13 ozs.

Amanda R. said that one of her twins (Born at 37+3) needed NICU for 3 nights. “That twin needed help with body temperature and sucking. While we were still in the hospital. We stayed for 4 nights so he (born at 4lbs 15 oz) spent one night in the room with us. The other twin, born at 6 lbs 12 oz, was with us every night. We went home after 4 nights and have been good since.”

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James F.’s twins were born at 37 and 3 and went home on the third day.

C.T.S. had boy/girl twins born at the end of 37 weeks. No NICU.

(RELATED: Check out the Dad's Guide to Twins Youtube channel for additional helpful twin tips and tricks videos.)

Meli’s twins were born exactly at 37 weeks with no NICU time.

Jennifer’s twins were born at 37 weeks 1 day. No NICU.

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Mona’s twins were born at 37w1d, weighing 6lb 15oz and 6lb 8oz. No NICU.

Drew said that his “twins were born 37+1, boy and girl 6lb3oz 18” and 6lb1oz 19”. Twins were delivered by cesarean and mom had some complications but is doing well now. Both babies spent two days in the NICU mostly precautionary with the cpap and feeding tubes then came off of each of those fairly quickly.”

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What to Prepare This Week

When Mom is 37 weeks pregnant with twins, she is physically no longer able to do much preparation. Any leftover tasks you have will need to be done by Dad or someone else. Hopefully, at this point, you don’t have much left to do since your twins will arrive any day now.

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Dad’s Thoughts

By the time Mom reaches 37 weeks pregnant with twins, she is extremely uncomfortable day and night. She is ready for the twins to be born NOW.

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Sources: When You’re Expecting Twins, Triplets, or Quads: Proven Guidelines for a Healthy Multiple Pregnancy by Dr. Barbara Luke and Tamara Eberlein and Babycenter’s Average fetal length and weight chart

Further Reading

Dad's Guide to Raising Twins book
Don't forget to pick up a copy of the definitive guide to raising twins. "Dad's Guide to Raising Twins" was written for fathers of twins to help guide you through the first several years with twins. Click here to learn more about the book and get your copy.

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