From conception to labor, your baby is constantly growing and developing. Your baby moves through different stages, starting equally a blastocyst, then maturing into an embryo, and and so a fetus. Around the v week mark, your baby's middle volition begin to beat, at 27 weeks they'll accept regular slumber and wake cycles, and at 39 weeks your baby is physically developed. Utilise this timeline to learn how big your infant is, plus how they're developing throughout pregnancy.
Follow your baby'south development week by week, from conception to labor, in these amazingly detailed, doc-reviewed images.
At the first of this week, you ovulate. Your egg is fertilized 12 to 24 hours later on if a sperm penetrates it. Over the side by side several days, the fertilized egg will start dividing into multiple cells as it travels down the fallopian tube, enters your uterus, and starts to burrow into the uterine lining.
Read well-nigh fertilization.
At present nestled in the nutrient-rich lining of your uterus is a microscopic ball of hundreds of rapidly multiplying cells that will develop into your infant. This ball of cells, chosen a blastocyst, has begun to produce the pregnancy hormone hCG, which tells your ovaries to finish releasing eggs.
Read about implantation.
Your ball of cells is at present officially an embryo. You're at present near 4 weeks from the beginning of your last menstruation. It's around this time – when your next period would normally exist due – that y'all might be able to get a positive consequence on a habitation pregnancy test.
Your baby is the size of a poppy seed.
Read virtually your pregnancy at 4 weeks.
Your infant resembles a polliwog more than than a human, but is growing fast. The circulatory system is start to class, and the tiny "middle" will start to crush this calendar week.
Your baby is the size of a sesame seed.
Read about your pregnancy at five weeks.
Your baby'south olfactory organ, mouth and ears are starting to take shape, and their intestines and encephalon are start to develop.
Your baby is the size of a lentil.
Read about your pregnancy at 6 weeks.
Your baby has doubled in size since last calendar week, simply still has a tail, which volition before long disappear. Footling easily and feet that look more than like paddles are emerging from the developing arms and legs.
Your baby is the size of a huckleberry.
Read about your pregnancy at 7 weeks.
Your baby has started moving around, though yous won't feel movement still. Nerve cells are branching out, forming archaic neural pathways. Breathing tubes at present extend from their throat to their developing lungs.
Your baby is the size of a kidney bean.
Read about your pregnancy at viii weeks.
Your infant's basic anatomy is developing (they even have tiny earlobes now), only there'southward much more to come. Their embryonic tail has disappeared and they counterbalance merely a fraction of an ounce only are about to start gaining weight fast.
Your baby is the size of a grape.
Read nearly your pregnancy at 9 weeks.
Your embryo has completed the most disquisitional portion of development. Their pare is notwithstanding translucent, just their tiny limbs can curve and fine details like nails are starting to form.
Your babe is the size of a kumquat
Read nigh your pregnancy at x weeks.
Your baby is about fully formed. They're kicking, stretching, and fifty-fifty hiccupping as their diaphragm develops, although you can't feel whatever activity yet.
Your baby is the size of a fig.
Read about your pregnancy at 11 weeks.
This week your baby's reflexes kick in: Their fingers volition soon brainstorm to open up and shut, toes will curl, and their rima oris will make sucking movements, although you won't experience their movements quite yet.
Your baby is the size of a lime.
Read about your pregnancy at 12 weeks.
This is the concluding week of your first trimester. Your baby's tiny fingers now have fingerprints, and their veins and organs are conspicuously visible through their skin. If you're having a daughter, her ovaries contain more than than 2 million eggs.
Your baby is the size of a pea pod.
Read about your pregnancy at 13 weeks.
In this illustration, you tin can encounter how big – and all the same, how tiny still – your baby is equally you begin your second trimester.
Afterward the first trimester, a miscarriage is much less likely. And for many moms-to-be, early pregnancy symptoms similar forenoon sickness and fatigue have faded abroad. If yous're feeling more than energetic now and haven't been exercising, it's a good fourth dimension to offset a regular pregnancy fettle routine.
Plus: See our ultimate pregnancy to-do list for the second trimester
Your infant'due south brain impulses accept begun to fire and they're using their facial muscles. Their kidneys are working at present, too. If you have an ultrasound, y'all may even meet them sucking their thumb.
Your baby is the size of a lemon.
Read about your pregnancy at 14 weeks.
Your baby's eyelids are even so fused shut, merely they can sense light. If yous smooth a flashlight on your tum, they'll move away from the beam. Ultrasounds washed this week may reveal your baby'south sex.
Your baby is the size of an apple.
Read about your pregnancy at 15 weeks.
The patterning on your babe's scalp has begun, though their hair isn't visible even so. Their legs are more than adult, their head is more upright, and their ears are close to their final position.
Your baby is the size of an avocado.
Read nearly your pregnancy at 16 weeks.
Your baby can move their joints, and their skeleton – formerly soft cartilage – is now hardening to os. The umbilical cord is growing stronger and thicker.
Your baby is the size of a turnip.
Read nigh your pregnancy at 17 weeks.
Your babe is flexing their arms and legs, and you may be able to feel those movements. Internally, a protective coating of myelin is forming around their fretfulness.
Your baby is the size of a bell pepper.
Read most your pregnancy at 18 weeks.
Your baby's senses – scent, vision, touch, taste and hearing – are developing and they may be able to hear your voice. Talk, sing or read out loud to them, if you feel like it.
Your baby is the size of an heirloom tomato plant.
Read nigh your pregnancy at 19 weeks.
Your baby tin can consume now and their digestive arrangement is producing meconium, the dark, sticky goo that they'll pass in their first poop – either in their diaper or in the womb during delivery.
Your babe is the size of a banana.
Read about your pregnancy at 20 weeks.
Your infant'due south movements have gone from flutters to total-on kicks and jabs against the walls of your womb. You may offset to notice patterns as you go more familiar with their activity.
Your baby is the size of a carrot.
Read about your pregnancy at 21 weeks.
Your baby now looks almost like a miniature newborn. Features such as lips and eyebrows are more than distinct, but the pigment that will color their optics isn't present however.
Your baby is the size of a spaghetti squash.
Read about your pregnancy at 22 weeks.
Your baby's ears are getting amend at picking up sounds. Afterward birth, they may recognize some noises outside the womb that they're hearing inside now.
Your baby is the size of a big mango.
Read virtually your pregnancy at 23 weeks.
Your infant cuts a pretty long and lean figure, but chubbier times are coming. Their skin is still thin and translucent, but that will begin to modify before long also.
Your infant is the size of an ear of corn.
Read about your pregnancy at 24 weeks.
Your baby's wrinkled skin is starting to fill out with baby fat, making them look more like a newborn. Their hair is beginning to come up in, and it has color and texture.
Your baby is now the aforementioned weight as an average rutabaga.
Read nearly your pregnancy at 25 weeks.
Your baby is now inhaling and exhaling amniotic fluid, which helps develop their lungs. These breathing movements are practiced practice for that first breath of air at birth.
Your baby is the size of a agglomeration of scallions.
Read nigh your pregnancy at 26 weeks.
This is the last week of your 2nd trimester. Your baby at present sleeps and wakes on a regular schedule, and their encephalon is very active. Their lungs aren't fully formed, but they could function outside the womb with medical help.
Your babe is the size of a head of cauliflower.
Read about your pregnancy at 27 weeks.
In this analogy, you'll notice that your growing baby takes up quite a bit of room these days. In the 3rd trimester, you might be peeing more than often or have leg cramps as they press on nerves in your hips and dorsum.
Now's the time to exercise things similar sign up for a childbirth class, cull a md for your baby, and create a baby registry, if you haven't done so already.
Your baby'due south eyesight is developing, which may enable them to sense calorie-free filtering in from the exterior. They tin can blink, and their eyelashes have grown in.
Your baby is the size of a large eggplant.
Read almost your pregnancy at 28 weeks.
Your baby'southward muscles and lungs are busy getting set to function in the outside globe, and their head is growing to make room for their developing brain.
Your baby is the size of a butternut squash.
Read about your pregnancy at 29 weeks.
Your baby is surrounded past a pint and a half of amniotic fluid, although there will be less of it equally they grow and claim more infinite inside your uterus.
Your baby is the size of a large cabbage.
Read about your pregnancy at 30 weeks.
Your baby tin can now turn their caput from side to side. A protective layer of fat is accumulating nether their pare, filling out their arms and legs.
Your babe is the size of a kokosnoot.
Read about your pregnancy at 31 weeks.
You lot're probably gaining nearly a pound a week now. Half of that goes direct to your baby, who will gain one-third to half their birth weight in the next seven weeks in grooming for life exterior the womb.
Your infant is the size of a large jicama.
Read about your pregnancy at 32 weeks.
The bones in your baby's skull aren't fused nevertheless. That allows them to shift every bit their head squeezes through the nascency culvert. They won't fully fuse until adulthood.
Your baby is the size of a pineapple.
Read about your pregnancy at 33 weeks.
Your baby's fundamental nervous system is maturing, every bit are their lungs. Babies born between 34 and 37 weeks who take no other health problems ordinarily practise well in the long run.
Your baby is the size of a cantaloupe.
Read about your pregnancy at 34 weeks.
It'southward getting snug inside your womb! Your baby'southward kidneys are fully developed, and their liver tin can procedure some waste products.
Your babe is the size of a honeydew melon.
Read near your pregnancy at 35 weeks.
Your infant is gaining about an ounce a twenty-four hour period. They're also losing well-nigh of their lanugo hair that covered their trunk, along with the vernix caseosa, a waxy substance that was protecting their skin until now.
Your baby is the size of a head of romaine lettuce.
Read about your pregnancy at 36 weeks.
Your due date is very close, and though your baby looks like a newborn, your baby is now considered at term. Over the next two weeks their lungs and brain will continue to mature. You lot tin can go into labor any 24-hour interval at present.
Your baby is the size of a agglomeration of Swiss chard.
Read almost your pregnancy at 37 weeks.
Are you curious about your infant'south eye colour? Their irises are not fully pigmented, so if they're born with blueish eyes, they could change to a darker color up until they're virtually a yr old.
Your baby is the size of a leek.
Read about your pregnancy at 38 weeks.
At 39 weeks, your infant volition be considered full-term. In the illustration, yous can run across the fungus plug sealing your uterus and how squished your intestines are now.
Your babe'southward physical evolution is complete, but they're still decorated putting on fatty and growing bigger.
Your baby is the size of a mini watermelon.
Read well-nigh your pregnancy at 39 weeks.
If you're by your due engagement, yous may not be every bit late as you think, particularly if you calculated information technology solely based on the mean solar day of your terminal flow. Sometimes women ovulate after than expected.
Your provider volition continuously appraise your pregnancy to make sure you lot can safely proceed your pregnancy.
Your baby is the size of a small pumpkin.
Read about your pregnancy at 40 weeks.
Your babe is at present considered tardily-term. Going more two weeks past your due date tin put you and your baby at risk for complications, and then your provider will probably talk to y'all most inducing labor. They may perform a Fetal Non-Stress test to monitor your babe'south fetal middle charge per unit and your contractions to brand certain your babe isn't in any fetal distress.
Read about your pregnancy at 41 weeks.
Meeting your babe for the first time is then heady – only exactly what volition pb up to that moment is unpredictable, and information technology's natural to feel nervous. Here's some assistance equally you set up for the large twenty-four hour period. Find out how you'll know you're in labor and what to wait from delivery, understand your childbirth choices, and more.
Learn the signs and stages of labor
Lookout man live birth videos
Take our free childbirth course
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