Approximately 9 To 13 Weeks

Nov 30, 2010 No Comments by
Your Baby This Month

Week 9. Your baby (who has officially graduated now from embryo to fetus) has grown to approximately 1 inch in length, about the size of a medium green olive. His or her head is continuing to develop and take on more baby-like proportions.
This week, tiny muscles are starting to form. This will allow your fetus to move his or her arms and legs, though it’ll be at least another month before you’ll be able to feel those little punches and kicks. While it’s way too early to feel anything,It’s not too early to hear something (possibly).The glorious sound of yours baby’s heartbeat might be audible via a Doppler device at your practitioner’s office.Take a listen-it’s sure to make your heart beat a little faster.
Week 10. At nearly 1 and a half inches long, your baby is growing by leaps and bounds. And in gearing up for those first leaps and bounds (and baby steps), bones and cartilage are forming – and small indentations on the legs are developing into knees and ankles.
Even more unbelievably for someone the size of a prune, the elbows on baby’s arms are already working. Tiny buds of baby teeth are forming under the gums.
Further down, the stomach is producing digestive juices, the kidneys are producing large quantities of urine, and, if your baby’s boy, his tests are producing testosterone (boys will be boys – even this early on!).
Week 11. Your baby is just over 2 inches long now and weighs about a third of an ounce. His or her body is straightening out and the torso is lengthening.
Hair follicles are forming, and fingernail and toenail beds are beginning to develop. Those nails are forming on individual fingers and toes, having separated recently from the webbed hands and feet of just a few weeks ago. And though you can’t tell baby’s gender by looking yet (even with an ultrasound), ovaries are developing if it’s a girl.
What you would be able to see, if your womb had a view, is that your fetus has distinct human characteristics by now, with hands and feet in the front of the body, ears nearly in their final shape (if not final location), open nasal passages on the tip of the nose, a tongue and palate in the mouth, and visible nipples.
Week 12. Your baby has more than doubled in the size during the past three weeks, weighing in now at half ounce and measuring (crown to rump) about two and a half inches. About the size of a large fresh plum, your baby’s body is hard at work in the development department. Though most of his or her systems are fully formed, there’s still plenty of maturing to do.
The digestive system is beginning to practice contraction movements (so your baby will be able to eat), the bone marrow is making white blood cells (so your baby will be able to fight off those germs passed around the playgroup), and the pituitary gland at the base of the brain has started producing hormones (so your baby will one day be able to make babies of his or her own).
Week 13. As your first trimester comes to a close, your fetus has reached the size of a peach, about 3 inches long. Your baby’s head is now about the size of his or her crown to rump length, but that cute little body is picking up steam and will continue growing overtime (at birth, your baby will be one-quarter head, three-quarters body).
Meanwhile, your baby’s intestines, which has been growing inside the umbilical cord, are now starting their trek to their permanent position in your baby’s abdomen.
Also developing this week : your baby’s vocal cords (the better to cry with…………soon!).

From Conception To Delivery, Nine Months And Counting, The Third Month
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