Your baby this week
Your baby now weighs approaching three pounds — around a kilo and a third — and measures roughly fifteen and a half inches long: about the size of a butternut squash. And the headline act this week is the brain. Its surface is developing deeper grooves and wrinkles, which creates more surface area for brain cells — and more room for the billions of connections forming right now. This is the construction phase that will continue at full tilt until birth and beyond: your baby's brain will roughly triple in weight between now and delivery day.
Meanwhile, the rest of the building crew is busy too. Your baby's muscles are strengthening and maturing — that's why movements feel less like flutters and more like committed kicks, rolls, and the occasional elbow with an opinion. The lungs keep maturing as well: the air sacs continue developing, and your baby keeps practicing breathing movements, rhythmically moving the muscles of breathing even though the “air” in there is fluid. Bones are hardening steadily, while the skull bones stay flexible and unfused — a design feature for birth day, not a flaw.
Your baby is also busy laying down fat now, including the white fat that rounds out those cheeks and helps regulate temperature after birth. On the outside, the skin looks smoother and less wrinkled every week. Your baby's eyes can open and close, the pupils can respond to light, and hearing is well established — your voice, your heartbeat, and the music of your household are the soundtrack of their world.
Many babies around now are also spending more time settling toward a head-down position, though there's still room for gymnastics, so don't read too much into today's orientation.
One more quiet development deserves its moment: your baby's sleep is becoming organized. Babies at this stage cycle between quiet sleep and active sleep — including those rapid-eye-movement periods linked with dreaming — and wakeful stretches in between. You may start noticing that pattern from the outside: still, peaceful hours, then a performance. That rhythm is the rough draft of the sleep-wake cycle your newborn will bring with them.
Your body & symptoms: the squashing stage
And what does all this construction feel like from your side of the wall? Your uterus now sits well above your belly button, which means your organs are negotiating for space. Shortness of breath is a regular guest — your lungs simply have less room to expand. Heartburn and indigestion often intensify for the same reason, and smaller, more frequent meals usually serve you better than three big ones. Constipation may also join the act; fiber, water, and gentle daily movement are the classic comforts.
Week 29's supporting cast: back, hip, and pelvic aches as your center of gravity shifts and your joints stay loose; Braxton Hicks practice contractions that come and go irregularly; leg cramps, often rudely arriving at night; mild swelling in feet and ankles, especially at day's end; itchy, stretching skin across your belly; and sleep that grows more elusive as finding a comfortable position becomes an engineering project.
You may also notice a little clumsiness — your balance has genuinely changed — and vivid, memorable dreams, which are extremely common in late pregnancy. Emotionally, this is often the week the finish line starts to feel real. The nursery lists get serious, the name discussions get earnest, and a wave of nesting energy may arrive right beside a wave of plain tiredness. Both are normal. Your body is doing elite-level work around the clock; responding to it with rest is not laziness — it's strategy.
A few smaller week-29 footnotes, for completeness: your nails may grow faster than ever while your hair feels thicker — pregnancy hormones slowing the usual shedding — and your skin may develop new sensitivities or a line of pigmentation down your belly. These are common cosmetic side effects of a system running at full capacity.
Kick counting: learning your baby's pattern
Now for one of the most empowering skills of this trimester: kick counting — or, more accurately, learning your baby's movement pattern. Movement is how your baby checks in with you, and because you are the world's leading expert on this particular baby, you'll notice a change before any machine does.
Here's how many moms do it. Choose a time when your baby is usually active — after a meal or in the evening, when you finally sit down, are classic baby-party hours. Get comfortable, ideally on your side with your feet up, and quietly tune in. Count any movements: kicks, rolls, stretches, pokes, and pushes all count, while hiccups are their own separate little rhythm. One common approach is to count to ten movements and note how long it takes. Many babies reach ten within the hour, and a widely used general guideline is about ten movements within up to two hours.
But the real goal is learning YOUR baby's normal: the morning stretches, the post-lunch wiggles, the evening dance routine. A gentle but important note: doctors vary — some give you a chart, some simply ask you to know the pattern. Ask yours exactly how they'd like you to track, and follow their way; if they haven't mentioned it, this week's visit is a perfect time to ask.
And if you ever notice a clear decrease in movement, or a pattern that feels different from your baby's normal, call the same day — don't wait until morning, and don't talk yourself out of it because you felt one kick an hour ago. Teams would rather check a healthy baby a hundred times than miss the one time it mattered. Your attention is part of the care, mama.
Feeding the construction crew
With a brain and bones under this much construction, what you eat quietly becomes building material. Two nutrients deserve a friendly spotlight this week — in general terms, because amounts and supplements are a conversation for your own doctor, who knows your blood work.
Calcium supports those hardening bones and growing teeth buds; you'll find it in dairy foods like milk, yogurt, and cheese, in calcium-fortified plant drinks, and in foods like almonds and leafy greens. Iron supports your expanding blood volume and helps carry oxygen to your baby; it's found in red meat, poultry, beans, lentils, and iron-fortified cereals — and pairing iron-rich plant foods with vitamin C foods, like citrus or bell peppers, helps your body absorb it.
The overall pattern that serves most moms: regular meals and snacks built on whole foods, protein at most meals, plenty of produce, and steady water through the day. And two standing reminders: keep caffeine under 200 milligrams a day — roughly one twelve-ounce coffee — and keep taking your prenatal vitamin with folic acid, in the 400 to 800 microgram range, as your doctor has advised. If fatigue feels heavier than ordinary tiredness, mention it — low iron is common in this trimester and your team can check it with a simple blood test.
And on the life side of week 29: this is a lovely window to begin nursery prep in earnest — the crib, a safe sleep space, a handful of newborn basics — while your energy is steadier than it may be at week 37. Little and often wins: one drawer, one shelf, one washed-and-folded pile of impossibly tiny clothes at a time.
One more project pays off all winter: the freezer. Doubling a soup, a sauce, or a casserole now and freezing half is a love letter to your future, fourth-trimester self — and building a list of favorite takeout places and friends who've offered to cook counts as exactly the same preparation. Fed is the goal; the method is negotiable.