Pregnancy Week 12 - A Week By Week Pregnancy Calendar

Your 12th Week of Pregnancy - The First Trimester

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Your Baby - 12 Weeks Pregnant

Pregnancy Week 12 By now, nearly all of your baby's organs, structures and systems are fully formed. The heart begins pumping several quarts of blood through your baby's body every day. Your baby has also begun to develop nerves and a spinal cord, allowing him to feel some types of pain. While your baby's brain is not the same size it will be at birth, it does have the same structure. Fingers and toes have separated and hair and nails continue to grow. Your baby is approximately 2.5 - 3.5 inches and weighs about 12 - 14 grams.

Also, the external genitals can now show definite signs of male and female gender. Before, where there was only reflex movement, your baby now moves spontaneously and at random, although his movements are still too slight to be felt. With the use of a Doppler, you may be able to hear your baby's heart beat at this office visit. It will sound very fast, similar to the sound of a running horse's hooves. Once you hear this sound, you can rest assured that your risk of miscarriage is greatly reduced.

Your Body - 12 Weeks Pregnant

Pregnancy Week 12 Belly Photo While your morning sickness and tiredness may be even less frequent, you may be getting lightheaded or have headaches again. This is from the increase in blood volume. Remember the safety precautions regarding dizziness? Well, those can apply here as well. Be sure to talk about any symptoms or illness you may experience with your healthcare provider. It is important for you to communicate any concerns, worries, or questions you may have.

Your uterus will begin to shift up and forward as it grows, taking the pressure off the bladder and you'll have fewer trips to the bathroom. But don't get too used to that. It won't be long - in the third trimester - where the baby and uterus will be big enough that they start pressing on your bladder again. Your placenta has taken over producing your hormones now so you may find yourself with slower, less frequent, less intense mood swings.

Photo submitted by Babies Online member Kendra K, 20 years old, in her 12th week of pregnancy with baby number two!

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Common Pregnancy Symptoms in Week 12

Early Pregnancy Questions

Babies Online Members in their 12th week of pregnancy have commonly asked the following questions: