Week 12

Week 12 Congratulations, Danielle! You're 12 Weeks Pregnant. Your baby now measures about 2.5 inches from crown to rump and weighs between three-tenths of an ounce and half an ounce. It is fully formed, from tooth buds to toenails. Your baby's job now is to continue to grow big and strong. With the most critical time in your baby's development behind you, the chance of miscarriage drops considerably after this week. Nausea and energy start to improve but occasional headaches, dizziness and fatigue from hormone changes may be present. If it's your first baby, you still could be wearing loose-fitting clothes, but if you've had other pregnancies, you most likely are back in maternity clothes. The typical weight gain by now is about three to five pounds. Fathers-to-be might also experience pregnancy symptoms, called couvade or "hatching," during the third month and at delivery, including nausea, abdominal pain, appetite changes and weight gain.
The end of the twelfth week of pregnancy marks the end of the first trimester. Your baby's fingers and toes have separated and are getting longer. Your baby can open and close its mouth and drinks amniotic fluid which it passes out as urine. Its head is becoming more rounded, though it is still large in proportion to its body. It has eyelids.
You can now hear your baby's heartbeat with a Doppler Ultrasound device!
Your baby continues to grow rapidly and has doubled in size in the last three weeks alone.
The face is beginning to look more human, and all body structures are present with a few refinements still in progress. Fingernails and toenails begin to develop this week.
Your baby's muscles are sufficiently developed to allow for involuntary movements at this time. The messages which control your baby's movements are sent from the spine, rather than the brain, which is not yet sufficiently developed.