Average fetal length and weight chart

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16
Feb
2007

How Big Is That Baby In Your Belly??

I get a lot of requests for a general idea of how big the fetus is inside the uterus. I found this chart at babycenter.com and wanted to post it for all of those curious mommies to be.

Gestational Age

Length(US)

Weight (US)

Length(cm)

Weight(cm)

(crown to rump)
(crown to rump)

8 weeks
0.63 inch
0.04 ounce
1.6 cm
1 gram

9 weeks
0.90 inch
0.07 ounce
2.3 cm
2 grams

10 [...]

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