Baby This Week: 38 Weeks

Your baby has really plumped up. She weighs about 6.8 pounds and she's over 19 1/2 inches long (like a leek). She has a firm grasp, which you'll soon be able to test when you hold her hand for the first time! Her organs have matured and are ready for life outside the womb. Wondering what color your baby's eyes will be? If she's born with brown eyes, they'll likely stay brown. If she's born with steel gray or dark blue eyes, they may stay gray or blue or turn green, hazel, or brown by the time she's 9 months old.

Baby This Week: 37 Weeks

Congratulations! Your baby is full-term! This means that if your baby arrives now, her lungs should be fully mature and ready to adjust to life outside the womb, even though your due date is still three weeks away. She weighs 6 1/3 pounds and measures a bit over 19 inches, head to heel (like a stalk of Swiss chard). Many babies have a full head of hair at birth, with locks from 1/2 inch to 1 1/2 inches long.

Baby This Week: 36 Weeks

Your baby is gaining about an ounce a day. She now weighs almost 6 pounds (like a crenshaw melon) and is more than 18 1/2 inches long. She's shedding most of the downy hair that covered her body, as well as the vernix caseosa, the waxy substance that protected her skin during her nine-month amniotic bath. Next week, your baby will be considered full-term. Most likely she's in a head-down position, but if she isn't, your practitioner may suggest scheduling an external cephalic version, where she'll try to turn your baby by manipulating her from the outside of your belly.

Baby This Week: 35 Weeks

Your baby doesn't have much room to maneuver now that she's over 18 inches long and tips the scales at 5 1/4 pounds (pick up a honeydew). Because it's so snug in your womb, she isn't likely to be doing somersaults anymore, but the number of times she kicks should remain about the same. Her kidneys are fully developed now, and her liver can process some waste products. Most of her basic physical development is now complete — she'll spend the next few weeks putting on weight.

Baby This Week: 33 Weeks

By 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 preparation for birth.

Baby This Week: 32 weeks

By 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 preparation for birth.

Baby This Week: 31 Weeks

This week, your baby measures over 16 inches long. She weighs about 3.3 pounds (try carrying four navel oranges) and is heading into a growth spurt. She can turn her head from side to side, and her arms, legs, and body are beginning to plump out as needed fat accumulates underneath her skin. She's probably moving a lot, too, so you may have trouble sleeping because your baby's kicks and somersaults keep you up. Take comfort: All this moving is a sign that your baby is active and healthy.

Baby This Week: 30 weeks

Your baby's about 15.7 inches long now, and she weighs almost 3 pounds (like a head of cabbage). A pint and a half of amniotic fluid surrounds her, but that volume will decrease as she gets bigger and takes up more room in your uterus. Her eyesight continues to develop, though it's not very keen; even after she's born, she'll keep her eyes closed for a good part of the day. When she does open them, she'll respond to changes in light but will have 20/400 vision — which means she can only make out objects a few inches from her face. (Normal adult vision is 20/20.)

Baby This Week: 29 weeks

Your baby is growing rapidly now. This week he 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 getting bigger to accommodate his growing brain — which is busy developing billions of neurons. Every day, about 200 milligrams of calcium is deposited in your baby's skeleton, which is now hardening. With this rapid growth, it's no surprise that your baby's nutritional needs reach their peak during this trimester.

Baby This Week: 28 weeks

By this week, your baby weighs two and a quarter pounds (like a Chinese cabbage) and measures 14.8 inches from the top of her head to her heels. She can open and close her eyes, which now sport lashes. This movement is more of a reflexive blink than a deliberate opening and closing, but it won't be long before she's batting those beauties at you.

Baby This Week: 27 weeks

This week, your baby weighs almost 2 pounds (like a head of cauliflower) and is about 14 1/2 inches long with her legs extended. She's sleeping and waking at regular intervals, opening and closing her eyes, and perhaps even sucking her fingers. With more brain tissue developing, your baby's brain is very active now. While her lungs are still immature, they would be capable of functioning — with a lot of medical help — if she were born now. Chalk up any tiny rhythmic movements you may be feeling to a case of baby hiccups, which may be common from now on. Each episode usually lasts only a few moments, and they don't bother her, so just relax and enjoy the tickle!

Baby This Week: 26 weeks

The network of nerves in your baby's ears is better developed and more sensitive than before. He may now be able to hear both your voice and your partner's as you chat with each other. He's inhaling and exhaling small amounts of amniotic fluid, which is essential for the development of his lungs. These so-called breathing movements are also good practice for when he's born and takes that first gulp of air. And he's continuing to put on baby fat. He now weighs about a pound and two-thirds and measures 14 inches (an English hothouse cucumber) from head to heel. If you're having a boy, his testicles are beginning to descend into his scrotum — a trip that will take two to three days.

Baby This Week: 25 weeks

Head to heels, your baby now measures about 13 1/2 inches. Her weight — a pound and a half — isn't much more than an average rutabaga, but she's beginning to exchange her long, lean look for some baby fat. As she does, her wrinkled skin will begin to smooth out and she'll start to look more and more like a newborn. She's also growing more hair — and if you could see it, you'd now be able to discern its color and texture.

Baby This Week: 24 weeks

Your baby's growing steadily, having gained about 4 ounces since last week. That puts her at just over a pound. Since she's almost a foot long (picture an ear of corn), she cuts a pretty lean figure at this point, but her body is filling out proportionally and she'll soon start to plump up. Her brain is also growing quickly now, and her taste buds are continuing to develop. Her lungs are developing "branches" of the respiratory "tree" as well as cells that produce surfactant, a substance that will help her air sacs inflate once she hits the outside world. Her skin is still thin and translucent, but that will start to change soon.

Baby This Week: 23 weeks

Turn on the radio and sway to the music. With her sense of movement well developed by now, your baby can feel you dance. And now that she's more than 11 inches long and weighs just over a pound (about as much as a large mango), you may be able to see her squirm underneath your clothes. Blood vessels in her lungs are developing to prepare for breathing, and the sounds that your baby's increasingly keen ears pick up are preparing her for entry into the outside world. Loud noises that become familiar now — such as your dog barking or the roar of the vacuum cleaner — probably won't faze her when she hears them outside the womb.

Baby This Week: 22 weeks

At 11 inches (the length of a spaghetti squash) and almost 1 pound, your baby is starting to look like a miniature newborn. Her lips, eyelids, and eyebrows are becoming more distinct, and she's even developing tiny tooth buds beneath her gums. Her eyes have formed, but her irises (the colored part of the eye) still lack pigment.
If you could see inside your womb, you'd be able to spot the fine hair (lanugo) that covers her body and the deep wrinkles on her skin, which she'll sport until she adds a padding of fat to fill them in. Inside her belly, her pancreas — essential for the production of some important hormones — is developing steadily.

Baby This Week: 21 weeks

Your baby now weighs about three-quarters of a pound and is approximately 10 1/2 inches long — the length of a carrot. You may soon feel like she's practicing martial arts as her initial fluttering movements turn into full-fledged kicks and nudges. You may also discover a pattern to her activity as you get to know her better. In other developments, your baby's eyebrows and lids are present now.

Baby This Week: 20 weeks

Congratulations — you're at the halfway mark! Your baby weighs about 10 1/2 ounces now. She's also around 6 1/2 inches long from head to bottom and about 10 inches from head to heel — the length of a banana. (For the first 20 weeks, when a baby's legs are curled up against his torso and hard to measure, measurements are taken from the top of his head to his bottom — the "crown to rump" measurement. After 20 weeks, he's measured from head to toe.) She's swallowing more these days, which is good practice for her digestive system. She's also producing meconium, a black, sticky by-product of digestion. This gooey substance will accumulate in his bowels, and you'll see it in his first soiled diaper (although some babies pass meconium in the womb or during delivery).

My Baby This Week: 19 Weeks

Your baby weighs about 8 1/2 ounces, and measures 6 inches, head to bottom — about the size of a large heirloom tomato. The hair on her scalp is sprouting. This is a crucial time for sensory development: Your baby's brain is designating specialized areas for smell, taste, hearing, vision, and touch. Some research suggests that she may be able to hear your voice now, so don't be shy about reading aloud, taking to her, or singing a happy tune if the mood strikes you.

My Baby This Week: 18 Weeks

Head to rump, your baby is about 5 1/2 inches long about the length of a bell pepper and he weighs almost 7 ounces. He's busy flexing his arms and legs — movements that you'll start noticing more and more in the weeks ahead. His blood vessels are visible through his thin skin, and his ears are now in their final position, although they're still standing out from his head a bit. A protective covering of myelin is beginning to form around his nerves, a process that will continue for a year after he's born. If you're having a girl, her uterus and fallopian tubes are formed and in place. If you're having a boy, his genitals are noticeable now, but he may hide them from you during an ultrasound.