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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)

Each baby is about the size of an artichoke.

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.

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4 Critical Mistakes Expectant Twin Parents Make

What to Expect

Typical weight gain for Mom at this point is between 1.25 to 2.0 pounds/week (0.6 to 0.9kg).

Total weight gain for the twin pregnancy so far will average between 20 to 30 pounds (9 to 13.6kg).

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

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.


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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.

From Your Fellow Parents at 20 Weeks Pregnant with Twins

Jacquilene S. – “Tired, but not too huge yet so still able to function.”

Nicole W. – “Got the baby room ready and getting the playroom ready.”

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.

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Still wondering how to prepare for your twins? I cover specific things you should know and prepare for in my Dad’s Guide to Twins book. Learn more about the book here.


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

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