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How Big Is Your Baby in First Trimester?

Wonder how big your baby is now? Here's an approximate look at size, weight and height in the first trimester.
Poppy seed Week 4

Baby's Length: <.25 in.

Baby's Weight: <.25 oz.

Baby's Size: Poppy seed



All length measurements in the first trimester are considered crown-to-rump (head-to-butt) because your baby's still too small to get an accurate head-to-toe assessment.