Here’s what to expect when you are 7 weeks pregnant with twins:
Fetal Development
By 7 weeks in the twin pregnancy, each of your twins will be about 0.5 inches long (13 mm) from crown to rump. Each baby is about the size of a blueberry.
Your twins’ hearts are starting to pump blood through the body and their livers are producing blood cells.
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What to Expect
Some symptoms at this stage include clothes starting to get tight and frequent trips to the bathroom.
Pictures and Video
Here’s an ultrasound video of what you might see at 7 weeks pregnant with twins:
Belly Picture at 7 weeks:
Dad’s Thoughts
You’re still so early in the pregnancy that you might have just found out you were having twins this week. You can’t believe that the positive pregnancy test has turned into twins. Your wife is having typical pregnancy symptoms on the outside (morning sickness, swings in appetite, etc.) but there are no outward signs that she’s carrying twins.
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Next: 8 Weeks
(NOTE: Still expecting? 
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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
