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Fetal Development

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Updated July 01, 2014

6 of 10

12 Week Fetus
Fetal Development

While your baby's brain is not the same size it will be at birth, it does have the same structure. Bile is being secreted by this time. S/he weighs about 14 grams and is approximately 3.54 inches in total length.

Your baby has its reflexes and also practice movements in the digestive tract. All of this in preparation for extrauterine life.

If your practitioner uses a doppler, you may be able to hear your baby's heart beat at this office visit. It will sound very fast. Some say that they hear clicking or the sounds of horse hooves. Either way it is a joyous sound to hear! Your risk of miscarriage is greatly reduced once you hear this sound.

More on Week 12 of Pregnancy

Photo © A.D.A.M. in Fetal Development

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