From conception to labor, your babe is constantly growing and developing. Your infant moves through different stages, starting equally a blastocyst, then maturing into an embryo, so a fetus. Around the 5 week marker, your baby'south center will begin to beat out, at 27 weeks they'll have regular slumber and wake cycles, and at 39 weeks your baby is physically adult. Use this timeline to acquire how big your baby is, plus how they're developing throughout pregnancy.
Follow your baby's development week by week, from conception to labor, in these amazingly detailed, physician-reviewed images.
At the beginning of this week, yous ovulate. Your egg is fertilized 12 to 24 hours later on if a sperm penetrates it. Over the next several days, the fertilized egg will start dividing into multiple cells as information technology travels downwardly the fallopian tube, enters your uterus, and starts to burrow into the uterine lining.
Read virtually fertilization.
Now nestled in the food-rich lining of your uterus is a microscopic brawl of hundreds of apace multiplying cells that will develop into your babe. This brawl of cells, called a blastocyst, has begun to produce the pregnancy hormone hCG, which tells your ovaries to cease releasing eggs.
Read most implantation.
Your brawl of cells is at present officially an embryo. Yous're at present about 4 weeks from the commencement of your last period. Information technology's around this fourth dimension – when your adjacent flow would normally exist due – that you might be able to get a positive result on a home pregnancy test.
Your babe is the size of a poppy seed.
Read about your pregnancy at 4 weeks.
Your infant resembles a polliwog more a human, just is growing fast. The circulatory system is starting time to form, and the tiny "heart" will start to shell this week.
Your baby is the size of a sesame seed.
Read about your pregnancy at v weeks.
Your baby'due south nose, oral fissure and ears are starting to accept shape, and their intestines and brain are outset to develop.
Your baby is the size of a lentil.
Read about your pregnancy at vi weeks.
Your baby has doubled in size since concluding week, but even so has a tail, which will soon disappear. Picayune hands and anxiety that look more like paddles are emerging from the developing arms and legs.
Your baby is the size of a huckleberry.
Read almost your pregnancy at 7 weeks.
Your baby has started moving effectually, though yous won't experience movement yet. Nerve cells are branching out, forming primitive neural pathways. Breathing tubes now extend from their throat to their developing lungs.
Your babe is the size of a kidney edible bean.
Read about your pregnancy at 8 weeks.
Your baby'south bones anatomy is developing (they even have tiny earlobes now), but there'south much more to come. Their embryonic tail has disappeared and they weigh just a fraction of an ounce merely are nigh to commencement gaining weight fast.
Your baby is the size of a grape.
Read near your pregnancy at 9 weeks.
Your embryo has completed the almost critical portion of development. Their peel is still translucent, but their tiny limbs can bend and fine details like nails are starting to form.
Your baby is the size of a kumquat
Read about your pregnancy at 10 weeks.
Your babe is almost fully formed. They're boot, stretching, and even hiccupping as their diaphragm develops, although you can't experience any activity withal.
Your baby is the size of a fig.
Read about your pregnancy at 11 weeks.
This week your baby'south reflexes kicking in: Their fingers will presently brainstorm to open and shut, toes will curl, and their mouth will brand sucking movements, although you won't feel their movements quite yet.
Your baby is the size of a lime.
Read about your pregnancy at 12 weeks.
This is the concluding calendar week of your first trimester. Your baby's tiny fingers at present have fingerprints, and their veins and organs are clearly visible through their skin. If you're having a daughter, her ovaries contain more than than 2 1000000 eggs.
Your baby is the size of a pea pod.
Read near your pregnancy at 13 weeks.
In this illustration, you tin can encounter how big – and yet, how tiny still – your baby is equally you begin your second trimester.
After the first trimester, a miscarriage is much less likely. And for many moms-to-be, early pregnancy symptoms like morning sickness and fatigue have faded away. If you're feeling more energetic now and haven't been exercising, it'south a good time to start a regular pregnancy fettle routine.
Plus: See our ultimate pregnancy to-do list for the second trimester
Your infant'due south brain impulses have begun to fire and they're using their facial muscles. Their kidneys are working now, as well. If you have an ultrasound, you may even see them sucking their thumb.
Your baby is the size of a lemon.
Read near your pregnancy at 14 weeks.
Your baby'due south eyelids are still fused shut, just they can sense light. If you shine a flashlight on your tummy, they'll move away from the beam. Ultrasounds done this calendar week may reveal your baby's sex.
Your baby is the size of an apple tree.
Read well-nigh your pregnancy at xv weeks.
The patterning on your infant'southward scalp has begun, though their hair isn't visible notwithstanding. Their legs are more than developed, their head is more upright, and their ears are close to their terminal position.
Your babe is the size of an avocado.
Read about your pregnancy at 16 weeks.
Your infant can move their joints, and their skeleton – formerly soft cartilage – is at present hardening to bone. The umbilical cord is growing stronger and thicker.
Your baby is the size of a turnip.
Read nigh your pregnancy at 17 weeks.
Your baby is flexing their artillery and legs, and you may be able to experience those movements. Internally, a protective blanket of myelin is forming around their nerves.
Your babe is the size of a bell pepper.
Read most your pregnancy at 18 weeks.
Your babe's senses – aroma, vision, touch on, sense of taste and hearing – are developing and they may be able to hear your voice. Talk, sing or read out loud to them, if you lot experience similar it.
Your baby is the size of an heirloom tomato.
Read nigh your pregnancy at 19 weeks.
Your infant can eat now and their digestive arrangement is producing meconium, the dark, sticky goo that they'll laissez passer in their outset poop – either in their diaper or in the womb during delivery.
Your baby is the size of a banana.
Read most your pregnancy at 20 weeks.
Your infant's movements take gone from flutters to total-on kicks and jabs against the walls of your womb. You may start to discover patterns as you go more familiar with their activeness.
Your babe is the size of a carrot.
Read well-nigh your pregnancy at 21 weeks.
Your baby now looks nigh similar a miniature newborn. Features such every bit lips and eyebrows are more distinct, only the pigment that will color their optics isn't nowadays all the same.
Your infant is the size of a spaghetti squash.
Read about your pregnancy at 22 weeks.
Your baby's ears are getting better at picking up sounds. Later on 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 about your pregnancy at 23 weeks.
Your baby cuts a pretty long and lean figure, but chubbier times are coming. Their skin is still thin and translucent, simply that will begin to change soon as well.
Your baby is the size of an ear of corn.
Read nigh your pregnancy at 24 weeks.
Your baby'southward wrinkled skin is starting to fill out with baby fat, making them look more like a newborn. Their pilus is offset to come in, and it has color and texture.
Your babe is now the aforementioned weight as an average rutabaga.
Read about your pregnancy at 25 weeks.
Your baby is now inhaling and exhaling amniotic fluid, which helps develop their lungs. These breathing movements are proficient practise for that first breath of air at nativity.
Your infant is the size of a bunch of scallions.
Read about your pregnancy at 26 weeks.
This is the last week of your second trimester. Your baby at present sleeps and wakes on a regular schedule, and their brain is very active. Their lungs aren't fully formed, but they could function outside the womb with medical help.
Your baby is the size of a head of cauliflower.
Read about your pregnancy at 27 weeks.
In this illustration, you'll notice that your growing baby takes upward quite a bit of room these days. In the third trimester, y'all might be peeing more often or have leg cramps every bit they press on fretfulness in your hips and dorsum.
Now's the time to do things similar sign up for a childbirth course, choose a md for your baby, and create a baby registry, if you haven't washed so already.
Your baby's eyesight is developing, which may enable them to sense calorie-free filtering in from the outside. They can blink, and their eyelashes take grown in.
Your baby is the size of a large eggplant.
Read most your pregnancy at 28 weeks.
Your infant's muscles and lungs are decorated getting ready to function in the exterior world, and their head is growing to make room for their developing encephalon.
Your baby is the size of a butternut squash.
Read about your pregnancy at 29 weeks.
Your baby is surrounded by a pint and a one-half of amniotic fluid, although there will be less of it as they abound and claim more infinite within your uterus.
Your baby is the size of a large cabbage.
Read about your pregnancy at 30 weeks.
Your baby tin now turn their head from side to side. A protective layer of fat is accumulating under their skin, filling out their arms and legs.
Your baby is the size of a kokosnoot.
Read about your pregnancy at 31 weeks.
You lot're probably gaining about a pound a calendar week at present. Half of that goes direct to your baby, who volition gain one-tertiary to half their nascence weight in the next seven weeks in preparation for life outside the womb.
Your baby is the size of a large jicama.
Read about your pregnancy at 32 weeks.
The basic in your baby's skull aren't fused however. That allows them to shift every bit their head squeezes through the birth culvert. They won't fully fuse until adulthood.
Your baby is the size of a pineapple.
Read near your pregnancy at 33 weeks.
Your babe'southward cardinal nervous organization is maturing, as are their lungs. Babies born between 34 and 37 weeks who have no other health bug usually do well in the long run.
Your baby is the size of a cantaloupe.
Read about your pregnancy at 34 weeks.
Information technology's getting snug inside your womb! Your baby's kidneys are fully developed, and their liver tin can process some waste products.
Your baby is the size of a honeydew melon.
Read about your pregnancy at 35 weeks.
Your baby is gaining near an ounce a day. They're also losing most of their lanugo hair that covered their body, forth 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 well-nigh 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 adjacent two weeks their lungs and brain will continue to mature. You can go into labor whatsoever day at present.
Your infant is the size of a bunch of Swiss chard.
Read well-nigh your pregnancy at 37 weeks.
Are you curious nigh your infant'due south eye color? Their irises are not fully pigmented, so if they're born with blue eyes, they could change to a darker colour up until they're about a year onetime.
Your baby is the size of a leek.
Read about your pregnancy at 38 weeks.
At 39 weeks, your infant will be considered total-term. In the illustration, you can see the mucus plug sealing your uterus and how squished your intestines are now.
Your babe's concrete development is consummate, simply they're still decorated putting on fat and growing bigger.
Your baby is the size of a mini watermelon.
Read about your pregnancy at 39 weeks.
If you're past your due date, y'all may not exist as belatedly every bit you lot think, particularly if you calculated information technology solely based on the day of your terminal period. Sometimes women ovulate later than expected.
Your provider will continuously assess your pregnancy to make sure yous can safely continue your pregnancy.
Your baby is the size of a pocket-sized pumpkin.
Read virtually your pregnancy at twoscore weeks.
Your baby is now considered tardily-term. Going more than than two weeks by your due engagement tin can put you and your infant at run a risk for complications, so your provider volition probably talk to you nigh inducing labor. They may perform a Fetal Not-Stress test to monitor your babe'southward fetal middle charge per unit and your contractions to brand sure your baby isn't in whatever fetal distress.
Read about your pregnancy at 41 weeks.
Meeting your baby for the first time is so heady – but exactly what will lead upwards to that moment is unpredictable, and it's natural to feel nervous. Here'south some assistance as yous prepare for the large day. Find out how you'll know you're in labor and what to look from commitment, sympathise your childbirth choices, and more.
Larn the signs and stages of labor
Watch live birth videos
Have our costless childbirth form
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