Skin is thin and see-through but will start to thicken soon. Toenails form. Neck is defined and lower limbs are developed. Hearing starts to develop. The part of the brain that controls motor movements is fully formed. Digestive system is working. Ears, nose, and lips are recognizable on an ultrasound exam. Kicks and turns are stronger. Sucking reflex is developing. Fat is forming under the skin. Ridges form in the hands and feet that later will be fingerprints and footprints.
Skin is wrinkled and reddish from visible blood vessels. Lungs are fully formed but not yet ready to function outside the uterus. Loud sounds can make your fetus respond with a startled movement and pull in the arms and legs. Eyelids can open and close. Nervous system is developing. Skin begins to look smoother as more fat is added. The fetus can stretch, kick, and make grasping motions.
Eyes can sense changes in light. Bone marrow is forming red blood cells. Head may have some hair. Lanugo begins to disappear. Bones harden but the skull remains soft and flexible. Fingernails have grown to the end of the fingers. Limbs begin to look chubby. The fetus may turn into a head-down position for birth.
Circulatory system is done developing. Musculoskeletal system also is done developing. Lungs, brain, and nervous system are finishing their development. Fat continues to be added all over to keep the baby warm after birth. Fertilization: A multistep process that joins the egg and the sperm. Genitals: The sexual or reproductive organs. Oxygen: An element that we breathe in to sustain life.
Sperm: A cell made in the male testicles that can fertilize a female egg. Article continues below Advertisement. If you have further questions, contact your ob-gyn.
Don't have an ob-gyn? Search for doctors near you. Topics: Pregnancy During Pregnancy. Learn About the Book. Your baby is the size of a bell pepper. Your baby's senses — smell, vision, touch, taste and hearing — are developing and she may be able to hear your voice.
Talk, sing or read out loud to her, if you feel like it. Your baby is the size of an heirloom tomato. Your baby can swallow now and his digestive system is producing meconium, the dark, sticky goo that he'll pass in his first poop — either in his diaper or in the womb during delivery. Your baby is the size of a banana. Your baby's movements have gone from flutters to full-on kicks and jabs against the walls of your womb.
You may start to notice patterns as you become more familiar with her activity. Your baby is the size of a carrot. Your baby now looks almost like a miniature newborn.
Features such as lips and eyebrows are more distinct, but the pigment that will color his eyes isn't present yet. Your baby is the size of a spaghetti squash.
Your baby's ears are getting better at picking up sounds. After birth, she may recognize some noises outside the womb that she's hearing inside now. Your baby is the size of a large mango. Your baby cuts a pretty long and lean figure, but chubbier times are coming. His skin is still thin and translucent, but that will begin to change soon too.
Your baby is the size of an ear of corn. Your baby's wrinkled skin is starting to fill out with baby fat, making her look more like a newborn. Her hair is beginning to come in, and it has color and texture. Your baby is now the same weight as an average rutabaga. Your baby is now inhaling and exhaling amniotic fluid, which helps develop his lungs. These breathing movements are good practice for that first breath of air at birth. Your baby is the size of a bunch of scallions.
This is the last week of your second trimester. Your baby now sleeps and wakes on a regular schedule, and her brain is very active. Her 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. In this illustration, you'll notice that your growing baby takes up quite a bit of room these days. In the third trimester, you might be peeing more often or have leg cramps as he presses on nerves in your hips and back.
The so-called honeymoon phase of pregnancy is over and parenthood is visible on the horizon has begun. Now's the time to do things like sign up for a childbirth class , choose a doctor for your baby , and create a baby registry.
Your baby's eyesight is developing, which may enable her to sense light filtering in from the outside. She can blink, and her eyelashes have grown in. Your baby is the size of a large eggplant. Your baby's muscles and lungs are busy getting ready to function in the outside world, and his head is growing to make room for his developing brain. Your baby is the size of a butternut squash.
Your baby is surrounded by a pint and a half of amniotic fluid, although there will be less of it as she grows and claims more space inside your uterus. Your baby is the size of a large cabbage. Your baby can now turn his head from side to side. A protective layer of fat is accumulating under his skin, filling out his arms and legs. Your baby is the size of a coconut. You're probably gaining about a pound a week.
Half of that goes straight to your baby, who will gain one-third to half her birth weight in the next seven weeks in preparation for life outside the womb. Your baby is the size of a large jicama.
The bones in your baby's skull aren't fused yet. That allows them to shift as his head squeezes through the birth canal. They won't fully fuse until adulthood.
Your baby is the size of a pineapple. Your baby's central nervous system is maturing, as are her lungs. Babies born between 34 and 37 weeks who have no other health problems usually do well in the long run. Your baby is the size of a cantaloupe. It's getting snug inside your womb! Your baby's kidneys are fully developed, and his liver can process some waste products. Your baby is the size of a honeydew melon. Your baby is gaining about an ounce a day.
She's also losing most of the fine down that covered her body, along with the vernix casosa, a waxy substance that was protecting her skin until now. Your baby is the size of a head of romaine lettuce. Your due date is very close, but though your baby looks like a newborn, he isn't quite ready for the outside world. Over the next two weeks his lungs and brain will fully mature.
Your baby is the size of a bunch of Swiss chard. Are you curious about your baby's eye color? Her irises are not fully pigmented, so if she's born with blue eyes, they could change to a darker color up until she's about a year old.
At 39 weeks, your baby will be considered full-term. In the illustration, you can see the mucus plug sealing your uterus and how squished your intestines are now. Your baby's physical development is complete, but he's still busy putting on fat he'll need to help regulate his body temperature in the outside world. Your baby is the size of a mini watermelon.
If you're past your due date you may not be as late as you think, especially if you calculated it solely based on the day of your last period. Sometimes women ovulate later than expected. But if you don't go into labor on your own by your due date, your healthcare provider will probably do tests such as a sonogram and a non-stress test to make sure you can safely continue your pregnancy.
Your baby is the size of a small pumpkin. Your baby is now considered late-term. Going more than two weeks past your due date can put you and your baby at risk for complications, so your provider will probably talk to you about inducing labor.
Meeting your baby for the first time is so exciting — but exactly what will lead up to that moment is unpredictable, and it's natural to feel nervous. Here's some help as you prepare for the big day. The zygote contains all of the genetic information DNA needed to become a baby. Half the DNA comes from the mother's egg and half from the father's sperm. The zygote spends the next few days traveling down the fallopian tube. During this time, it divides to form a ball of cells called a blastocyst.
A blastocyst is made up of an inner group of cells with an outer shell. The inner group of cells will become the embryo. The embryo is what will develop into your baby. The outer group of cells will become structures, called membranes, which nourish and protect the embryo.
Week 4 Once the blastocyst reaches the uterus, it buries itself in the uterine wall. At this point in the mother's menstrual cycle, the lining of the uterus is thick with blood and ready to support a baby. The blastocyst sticks tightly to the wall of the uterus and receives nourishment from the mother's blood.
Watch this video about: Cell division. Alternative Names. Fetus at 3.
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