From conception to labor, your baby is constantly growing and developing. Your babe moves through unlike stages, starting every bit a blastocyst, then maturing into an embryo, and then a fetus. Effectually the 5 calendar week marker, your baby's centre volition begin to beat, at 27 weeks they'll have regular sleep and wake cycles, and at 39 weeks your baby is physically adult. Utilize this timeline to learn how big your baby is, plus how they're developing throughout pregnancy.
Follow your baby'southward development week past week, from conception to labor, in these amazingly detailed, doctor-reviewed images.
At the showtime of this calendar week, you ovulate. Your egg is fertilized 12 to 24 hours later if a sperm penetrates it. Over the adjacent several days, the fertilized egg volition starting time dividing into multiple cells as it travels downwards the fallopian tube, enters your uterus, and starts to burrow into the uterine lining.
Read about fertilization.
Now nestled in the nutrient-rich lining of your uterus is a microscopic ball of hundreds of rapidly multiplying cells that will develop into your baby. This ball of cells, called a blastocyst, has begun to produce the pregnancy hormone hCG, which tells your ovaries to end releasing eggs.
Read most implantation.
Your ball of cells is now officially an embryo. You're now well-nigh 4 weeks from the beginning of your last period. It's around this time – when your next period would normally be due – that you might be able to get a positive upshot on a home pregnancy test.
Your baby is the size of a poppy seed.
Read about your pregnancy at 4 weeks.
Your baby resembles a tadpole more than than a homo, but is growing fast. The circulatory system is offset to form, and the tiny "heart" volition start to beat this week.
Your babe is the size of a sesame seed.
Read almost your pregnancy at 5 weeks.
Your infant's olfactory organ, mouth and ears are starting to take shape, and their intestines and brain are get-go to develop.
Your infant is the size of a lentil.
Read well-nigh your pregnancy at 6 weeks.
Your infant has doubled in size since concluding calendar week, but nonetheless has a tail, which will shortly disappear. Footling hands and feet that wait more than like paddles are emerging from the developing artillery and legs.
Your baby is the size of a blueberry.
Read almost your pregnancy at 7 weeks.
Your baby has started moving around, though you won't feel motion even so. Nervus cells are branching out, forming archaic neural pathways. Animate tubes now extend from their throat to their developing lungs.
Your baby is the size of a kidney bean.
Read nearly your pregnancy at 8 weeks.
Your baby'south basic anatomy is developing (they even have tiny earlobes now), but at that place's much more than to come. Their embryonic tail has disappeared and they weigh simply a fraction of an ounce but are about to start gaining weight fast.
Your infant is the size of a grape.
Read about your pregnancy at 9 weeks.
Your embryo has completed the most disquisitional portion of development. Their skin is still translucent, only their tiny limbs tin can bend and fine details like nails are starting to form.
Your baby is the size of a kumquat
Read virtually your pregnancy at 10 weeks.
Your baby is well-nigh fully formed. They're kicking, stretching, and fifty-fifty hiccupping every bit their diaphragm develops, although you lot can't feel any activeness yet.
Your baby is the size of a fig.
Read well-nigh your pregnancy at 11 weeks.
This week your baby's reflexes kick in: Their fingers will soon begin to open and close, toes will scroll, and their oral cavity will brand sucking movements, although you won't experience their movements quite still.
Your infant is the size of a lime.
Read about your pregnancy at 12 weeks.
This is the final week of your offset trimester. Your babe's tiny fingers now have fingerprints, and their veins and organs are conspicuously visible through their peel. If you're having a girl, her ovaries contain more than 2 million eggs.
Your baby is the size of a pea pod.
Read nearly your pregnancy at 13 weeks.
In this illustration, you can see how big – and yet, how tiny all the same – your baby is equally you brainstorm your 2nd trimester.
After the first trimester, a miscarriage is much less likely. And for many moms-to-be, early on pregnancy symptoms like morning sickness and fatigue have faded away. If you're feeling more than energetic now and haven't been exercising, it's a good time to showtime a regular pregnancy fitness routine.
Plus: Come across our ultimate pregnancy to-practice listing for the second trimester
Your infant's brain impulses have begun to fire and they're using their facial muscles. Their kidneys are working now, too. 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 fourteen weeks.
Your babe'due south eyelids are nonetheless fused shut, but they can sense low-cal. If yous shine a flashlight on your tummy, they'll move away from the beam. Ultrasounds done this week may reveal your baby'south sex.
Your baby is the size of an apple.
Read most your pregnancy at 15 weeks.
The patterning on your baby's scalp has begun, though their hair isn't visible yet. Their legs are more developed, their caput is more upright, and their ears are shut to their final position.
Your babe is the size of an avocado.
Read well-nigh your pregnancy at 16 weeks.
Your baby can movement their joints, and their skeleton – formerly soft cartilage – is now hardening to bone. The umbilical cord is growing stronger and thicker.
Your baby is the size of a turnip.
Read virtually your pregnancy at 17 weeks.
Your baby is flexing their arms and legs, and you may be able to feel those movements. Internally, a protective blanket of myelin is forming effectually their nerves.
Your infant is the size of a bell pepper.
Read about your pregnancy at 18 weeks.
Your infant'south senses – smell, vision, touch, sense of taste and hearing – are developing and they may exist 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.
Read well-nigh your pregnancy at 19 weeks.
Your baby can swallow now and their digestive system is producing meconium, the dark, sticky goo that they'll pass in their starting time poop – either in their diaper or in the womb during delivery.
Your baby is the size of a banana.
Read nigh your pregnancy at xx weeks.
Your infant's movements have gone from flutters to full-on kicks and jabs against the walls of your womb. You may start to notice patterns equally you lot become more familiar with their activity.
Your babe is the size of a carrot.
Read about your pregnancy at 21 weeks.
Your infant now looks almost like a miniature newborn. Features such as lips and eyebrows are more distinct, only the pigment that will color their eyes isn't present all the same.
Your baby is the size of a spaghetti squash.
Read nigh your pregnancy at 22 weeks.
Your baby's ears are getting better at picking up sounds. Afterward nativity, they may recognize some noises outside the womb that they're hearing within now.
Your baby is the size of a large mango.
Read about your pregnancy at 23 weeks.
Your babe cuts a pretty long and lean figure, but chubbier times are coming. Their skin is nevertheless thin and translucent, but that will begin to modify soon besides.
Your baby is the size of an ear of corn.
Read about your pregnancy at 24 weeks.
Your baby's wrinkled skin is starting to fill up out with baby fatty, making them look more similar a newborn. Their hair is beginning to come in, and it has color and texture.
Your baby is now the same 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 animate movements are good do for that get-go breath of air at nascence.
Your baby is the size of a agglomeration of scallions.
Read about your pregnancy at 26 weeks.
This is the last week of your second trimester. Your baby now sleeps and wakes on a regular schedule, and their encephalon is very agile. Their lungs aren't fully formed, merely they could office outside the womb with medical assist.
Your baby is the size of a caput of cauliflower.
Read near your pregnancy at 27 weeks.
In this analogy, yous'll notice that your growing babe takes up quite a scrap of room these days. In the third trimester, yous might be peeing more than often or have leg cramps as they press on nerves in your hips and dorsum.
Now'southward the time to do things like sign upward for a childbirth class, cull a medico for your baby, and create a baby registry, if you haven't done so already.
Your baby'southward eyesight is developing, which may enable them to sense light filtering in from the outside. They tin blink, and their eyelashes have grown in.
Your babe is the size of a big eggplant.
Read about your pregnancy at 28 weeks.
Your baby's muscles and lungs are busy getting set to office in the outside world, and their caput 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 by a pint and a half of amniotic fluid, although there volition be less of information technology as they grow and claim more space inside your uterus.
Your baby is the size of a large cabbage.
Read near your pregnancy at 30 weeks.
Your baby can now turn their head from side to side. A protective layer of fatty is accumulating under their skin, filling out their arms and legs.
Your babe is the size of a kokosnoot.
Read nigh your pregnancy at 31 weeks.
Yous're probably gaining about a pound a week now. Half of that goes straight to your babe, who will gain one-3rd to half their birth weight in the next seven weeks in grooming for life outside the womb.
Your infant is the size of a large jicama.
Read virtually your pregnancy at 32 weeks.
The bones in your baby's skull aren't fused all the same. That allows them to shift as their head squeezes through the birth canal. They won't fully fuse until adulthood.
Your baby is the size of a pineapple.
Read near your pregnancy at 33 weeks.
Your baby's central nervous organization is maturing, as are their lungs. Babies built-in between 34 and 37 weeks who have no other wellness problems usually practice well in the long run.
Your baby is the size of a cantaloupe.
Read near your pregnancy at 34 weeks.
It'southward getting snug inside your womb! Your baby'south kidneys are fully developed, and their liver tin process some waste products.
Your baby is the size of a honeydew melon.
Read nearly your pregnancy at 35 weeks.
Your baby is gaining well-nigh an ounce a day. They're also losing nearly of their lanugo hair that covered their body, along with the vernix caseosa, a waxy substance that was protecting their skin until now.
Your babe is the size of a head of romaine lettuce.
Read about your pregnancy at 36 weeks.
Your due date is very shut, and though your babe looks similar a newborn, your babe is now considered at term. Over the next ii weeks their lungs and brain will go on to mature. You tin can go into labor any day now.
Your babe is the size of a bunch of Swiss chard.
Read about your pregnancy at 37 weeks.
Are you curious nigh your infant's eye color? Their irises are non fully pigmented, so if they're born with bluish eyes, they could alter to a darker color upwardly until they're about a year old.
Your baby is the size of a leek.
Read virtually your pregnancy at 38 weeks.
At 39 weeks, your baby will be considered full-term. In the illustration, you lot tin see the mucus plug sealing your uterus and how squished your intestines are now.
Your baby's physical evolution is consummate, but they're still busy putting on fat and growing bigger.
Your baby is the size of a mini watermelon.
Read near your pregnancy at 39 weeks.
If you're past your due engagement, you lot may not be every bit belatedly as you think, especially if you calculated it solely based on the day of your last period. Sometimes women ovulate afterwards than expected.
Your provider will continuously appraise your pregnancy to make certain y'all can safely continue your pregnancy.
Your infant is the size of a small pumpkin.
Read about your pregnancy at 40 weeks.
Your babe is now considered belatedly-term. Going more than 2 weeks past your due appointment can put you and your baby at risk for complications, so your provider will probably talk to you virtually inducing labor. They may perform a Fetal Non-Stress test to monitor your baby's fetal heart rate and your contractions to make sure your babe isn't in any fetal distress.
Read almost your pregnancy at 41 weeks.
Meeting your baby for the start fourth dimension is so exciting – but exactly what volition pb up to that moment is unpredictable, and it's natural to feel nervous. Hither's some help as you ready for the big day. Find out how y'all'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
Spotter live nascency videos
Take our gratis childbirth class
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