Week by Week Twin Pregnancy Updates 
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.
For more details on Mom’s health, see:
Mom & Baby at 7 Weeks Pregnant
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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(RELATED: Expecting twins? Avoid these 4 critical mistakes expectant twin parents make.)
Next: 8 Weeks
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Further Reading
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