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Pregnancy Week by Week in Photos - Week 13

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Updated June 20, 2010

Fetus - 13th Week of Pregnancy - Second Trimester

This is a baby in the 13th week of pregnancy.

Photo © A.D.A.M.
Pregnancy - Week Thirteen

Twenty eight paper clips! (Are you starting a small pile on your desk?) Your baby is a whole ounce now, or 28.3 paper clips heavy. In addition to gaining weight, your baby has also undergone lots of other changes, like the production of meconium in the intestines, the formation of teeth and more. Did you know that your placenta weighs about an ounce as well at this point?

More from Week Thirteen:
Ultrasounds | 13 Week Belly Photos | Pregnancy Calendar

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