20 Weeks Pregnant with Twins

Here’s what to expect when you are 20 weeks pregnant with twins:

Fetal Development

By 20 weeks in the twin pregnancy your twins are about 10 inches tall (26 cm) from head to foot and each weigh 10 ounces (300 grams). Each baby will average the following measurements:

Head circumference: 7″ (178mm) about the size of an egg
Abdominal Circumference: 6.25″ (158mm) which means you could wrap a US dollar bill around their belly
Femur Length: 1.3″ (34mm)

Your twins are covered in fuzzy fine hair and a slippery white substance to protect their skin. They’ve got finger nails now which, as they grow, will likely scratch themselves before being born.

Read more about your twins’ growth here: Twins fetal development: 20 weeks pregnant.

What to Expect

Typical weight gain for Mom at this point is between 1.25 to 2.0 pounds/week.

Total weight gain for the twin pregnancy so far will average between 20 to 30 pounds.

Mom should be able to feel the babies moving by now.

For more details on Mom’s health, see:
Mom & Baby at 20 Weeks Pregnant
Week by week Twins calendar: pregnancy in weeks 16-20

Pictures and Video

Here’s an ultrasound video of what you might see at 20 weeks pregnant with twins:

Belly picture at 20 weeks:
20 Weeks Pregnant with Twins Belly

If Your Twins Were Born This Week

Your twins are still very early and ahead of the 24 week milestone that is the viability of life threshold. Most twins born at 20 weeks do not survive. Those that do have major medical complications.

What to Prepare This Week

When Mom is 20 weeks pregnant with twins, you need to have your transportation plans in place. Will your current car be big enough to carry your entire family once the twins arrive? You can get creative and fit twins in a smaller car or go shopping for a big SUV for your twin family.

Dad’s Thoughts

By the time Mom reaches 20 weeks pregnant with twins, she will likely start having temperature issues. She will be hotter than everyone else in the room. So if you fought about the thermostat temperature before the pregnancy, your disagreements will likely increase here. Do what you can to accommodate her temperature needs. Dad can always dress differently at home to be comfortable. Mom can’t shed the oven she’s got until the twins are born.

Previous: 19 Weeks

Next: 21 Weeks

View entire Twin Pregnancy Week by Week

Sources

When You’re Expecting Twins, Triplets, or Quads: Proven Guidelines for a Healthy Multiple Pregnancy by Dr. Barbara Luke and Tamara Eberlein

Babycenter’s Average fetal length and weight chart

Please note that everything on this page is provided as general information and doesn’t imply specific medical advice, diagnosis or treatment. Always consult with your medical professional.

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Written by , author of The Dad's Guide to Twins