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Week 6
Your baby's length is now about 3 to 5 millimeters -- about the size of a peppercorn! The brain is forming three separate parts: the forebrain (memory and reasoning), the midbrain (translates messages from the brain to organs and limbs) and the hindbrain (regulates breathing and muscle movement). At this point the embryo is now three-dimensional and completely enclosed in the amniotic sac. -
Week 9
http://www.whattoexpect.com/pregnancy/week-by-week/week-9.aspxYour baby, now the size of a green olive, has grown about an inch since last week. Tiny muscles are beginning to form, so while he might not be ready to pump iron, he's gearing up to move his arms and legs. It's still too soon to feel anything in your belly, but you might be able to hear something at your next checkup. Try listening for your baby's heartbeat via a Doppler device — that welcome sound should be audible anytime now. -
Week 13
http://www.whattoexpect.com/pregnancy/week-by-week/week-13.aspx Well, besides being as large as a peach now, that big old noggin of hers is now about half the size of her crown-to-rump length (that’s one reason why your little peach looks more like an alien from outer space at this point). By the time you give birth, her body will catch up, measuring three-quarters of her total size. What else is going on in there? Tiny bones are beginning to form in her arms and legs, the intestines are beginning to move from the umbilical cord to the abdomen, and the voca -
Week 16
http://www.whattoexpect.com/pregnancy/week-by-week/week-16.aspxYour baby now weighs in at a whopping three to five ounces, and he's four to five inches in length. The bones that are now in place in his ears means he can probably hear your voice as you talk to your partner and pals and sing in the car. While he’s getting used to your voice, the tiny muscles in his body, especially the ones in his back, are gaining strength, so he can straighten out a little more. And thanks to his developing facial muscles, your baby is capable of making a few expressive fro -
Week 20
http://www.whattoexpect.com/pregnancy/20-weeks-pregnant.aspxCurious about whether that melon-sized belly contains a boy or a girl? Now's your chance to take a peek! Your second trimester ultrasound, scheduled for anytime between 18 and 22 weeks, gives your practitioner a chance to see how things are going in there. And, wow, are they going! If you're having a girl, her uterus is now fully formed and her ovaries are holding about seven million primitive eggs. If you're having a boy, his testicles have begun their descent from the abdomen to their ultimate -
Week 25
http://www.whattoexpect.com/pregnancy/week-by-week/week-25.aspxYour baby is growing by leaps and bounds, reaching nine inches in length and passing the pound and a half mark. Under his skin, capillaries are forming and filling with blood and by week's end, air sacs (also lined with capillaries) will develop in his lungs, getting them ready for that first breath. Mind you, those lungs aren't ready for prime time just yet — but they are developing surfactant, a substance that will help them expand after birth. And speaking of breathing, your baby's tiny nostr -
Week 29
http://www.babycenter.com/6_your-pregnancy-29-weeks_1118.bcYour baby now weighs about 2 1/2 pounds (like a butternut squash) and is a tad over 15 inches long from head to heel. His muscles and lungs are continuing to mature, and his head is growing bigger to make room for his developing brain. To meet his increasing nutritional demands, you'll need plenty of protein, vitamins C, folic acid, and iron. And because his bones are soaking up lots of calcium, be sure to drink your milk (or find another good source of calcium, such as cheese, yogurt, or enrich -
Week 32
http://www.babycenter.com/6_your-pregnancy-32-weeks_1121.bcBy now, your baby weighs 3.75 pounds (pick up a large jicama) and is about 16.7 inches long, taking up a lot of space in your uterus. You're gaining about a pound a week and roughly half of that goes right to your baby. In fact, she'll gain a third to half of her birth weight during the next 7 weeks as she fattens up for survival outside the womb. She now has toenails, fingernails, and real hair (or at least respectable peach fuzz). Her skin is becoming soft and smooth as she plumps up in prepar -
Week 35
http://www.babycenter.com/6_your-pregnancy-35-weeks_1124.bcYour baby doesn't have much room to maneuver now that he's over 18 inches long and tips the scales at 5 1/4 pounds (pick up a honeydew melon). Because it's so snug in your womb, he isn't likely to be doing somersaults anymore, but the number of times he kicks should remain about the same. His kidneys are fully developed now, and his liver can process some waste products. Most of his basic physical development is now complete — he'll spend the next few weeks putting on weight. -
Week 40
http://www.babycenter.com/6_your-pregnancy-40-weeks_1129.bct's hard to say for sure how big your baby will be, but the average newborn weighs about 7 1/2 pounds (a small pumpkin) and is about 20 inches long. His skull bones are not yet fused, which allows them to overlap a bit if it's a snug fit through the birth canal during labor. This so-called "molding" is the reason your baby's noggin may look a little conehead-ish after birth. Rest assured — it's normal and temporary.
