13 Weeks Pregnant with Twins

Congratulations, you’ve made it to the second trimester. Here’s what to expect when you are 13 weeks pregnant with twins:

Fetal Development

By 13 weeks in the twin pregnancy each of your twins is 2.9″ (7.4 cm) from head to rump and weighs 0.8 ounces (23 grams) and averages the following measurements:

Head circumference: 3.5″ (89 mm)
Abdominal Circumference: 3″ (76 mm)
Femur Bone Length (about from the waist to knee): 0.5″ (13 mm)

Each baby is about the size of a pea pod or lemon.

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What to Expect

Typical weight gain for Mom at this point is between 1 to 1.5 pounds/week (0.5 to 0.7kg).

Pictures and Video

Here’s an ultrasound video of what you might see at 13 weeks pregnant with twins:

Twin Gender Predictor Calculator

Belly picture at 13 weeks:
13 Weeks Pregnant with Twins Belly

What to Prepare This Week

When Mom is 13 weeks pregnant with twins, it is a great time to find a local group for fathers of twins. This will give you a local support group that you and your family can rely on during the twin pregnancy and beyond.

Dad’s Thoughts

By the time Mom reaches 13 weeks pregnant with twins, you are entering the 2nd trimester. This is typically the sweet spot where life gets a little easier for Mom. Morning sickness should be fading and she still isn’t so big that life is miserable. As the 2nd trimester ends, she’ll start to be very large and uncomfortable. Take the current window of opportunity to prepare your home and family for the twins.

(RELATED: Still looking for the right twin gear? See my Twin Baby Gear Essentials.)

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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

4 Critical Mistakes Expectant Twin Parents Make

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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