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Pregnancy Week 12


Updated July 17, 2014

Pregnant woman on sofa holding mug
Compassionate Eye Foundation/Digital Vision/Getty Images


You may actually start feeling better from your extreme tiredness and nausea this week. Others will hang on to it for awhile longer. Your abdomen may start expanding, especially if this is not your first pregnancy.

Your placenta will take over the production of hormones around this time. If you have suffered from corpus luteum cysts they may begin to dissolve now. Your risk of miscarriage is reduced even further.


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 in preparation for extrauterine life. If your practitioner uses a doppler, you may be able to hear your baby's heart beat at this prenatal visit. Some say it sounds like horses. Your risk of miscarriage is greatly reduced once you hear this sound.


Consider joining a support group for dads! There are plenty of online groups dedicated to the art of fathering. These groups can be havens for you to discuss all of your feelings from the good to the bad and every joy and frustration in between.

Readers Share:

I can remember clearly how I felt the first time that I heard the clippity clop of my baby's heart beat for the first time. I also remember feeling anxious as they looked around my still small belly trying to find it. How far along were you when you heard it? How did you feel? Who was with you?

Share Your Feelings

Twin Tips:

Your uterus may begin to measure larger for dates than a singleton mom. This could also be one of the first times that multiples are suspected. Are you having twins?

Suggested Reading:

Expecting Fitness by Brigitta Gallo
A look at ways to stay fit or get fit in pregnancy. Fitness can help alleviate pregnancy symptoms as well as make labor easier for you.
Click Here to Order

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More Pregnancy Weeks:

Pregnancy Calendar

Baby weights can vary widely. Please see your practitioner with questions.

Photo © T. Foster

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