Sunday, February 8, 2009

12 and 13 week update

I cannot believe I forgot to do a 12 week update! Now I feel like a bad mommy :(

I'm definitely feeling better, when it comes to the morning sickness. I am not sleeping well though and I have been getting headaches. I guess I need to drink more water. I've been spending a lot of time adding "the essential" items to our baby registry - I'm going by what I have seen on friends' registries and using the checklist from Babies R Us. I have a feeling that most experienced moms would say that you don't need EVERYTHING the BRU checklist says that you need. A lot of it does seem redundant.

In the last couple weeks this is how the baby has been developing:

Week 12

Your baby's crown-to-rump length is almost 2.5 inches and she now weighs between 8 and 14 grams! In just three weeks, your baby's size has more than doubled and begins to look a lot more human. Even though you won't be able to feel your baby moving at this time, you can stimulate him and he will squint, open his mouth and move his fingers or toes.

Your baby develops reflexes and the skin is very sensitive. The brain is fully formed, and the child can feel pain :( The baby may even suck his thumb. The eyelids now cover the eyes, and will remain shut until the seventh month to protect the delicate optical nerve fibers.

Week 13

This is the last week of your first trimester and your baby weighs 14 to 20 grams. The crown-to-rump length of your growing baby is 2.6 to 3.1 inches.

There is a milky membrane that surrounds your baby. It is pierced by the umbilical cord and is made up of two layers, which are fused together. Your placenta provides most of the nutrients and oxygen that your baby needs. By this week, the placenta is well formed and ready to take over hormone manufacture from your ovaries. The placenta will produce progesterone and estriol. These hormones will be crucial in the maintenance of your pregnancy. Tissue that will form your baby's bones is being laid down, especially around the head and limbs. The nose and chin are becoming more prominent. Your baby's eyelids meet and fuse together and they will not open again for nearly four months. The eyes started out on the side of your baby's head and they are now moving closer together on the face. The ears come to lie in their normal position on the sides of the head.

The sockets for all twenty teeth are formed in the gums, and vocal cords are beginning to form.


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