In the other half, the embryo itself continues to grow, and a sheet of cells has just begun to create the neural tube, where your baby's brain, spinal cord and backbone will ultimately form. This week, your baby's ticker will start beating for the first time! Neither you nor your doctor can hear it yet, but it may be possible to see the movement on an ultrasound. And your little one has been really busy growing! The embryo now has three distinct layers: the outer ectoderm, which will form the nervous system, ears, eyes, inner ear and many connective tissues; the endoderm, or inner layer, which will grow into internal organs like the lungs, intestines and bladder; and the middle mesoderm, which will eventually make way for the heart and circulatory system.
In the weeks to come, the mesoderm will also evolve into bones, muscles, kidneys and reproductive organs. By the end of this week your baby will have tripled in size! His heart is now beating with a regular rhythm.
It's still too faint to be picked up by your doctor's stethoscope, but if you have an ultrasound at some point over the next few weeks it will probably be visible as a tiny, pulsing dot in the middle of his mini body. Fun fact: From now until birth , your child's heart will beat about times a minute -- twice the average adult rate. Also this week, your baby's brain hemispheres are forming -- and brain waves can now be recorded.
Your baby is already developing amazingly distinct facial features. Dark spots mark the areas where her eyes and nostrils will be, and a little mouth and ears are starting to form, too. Your baby's brain is also growing more complex; if you could take a peek, it would be clearly visible inside the transparent skull.
In fact, nerve cells in your baby's brain are growing at an amazing rate -- , cells per minute! And she's started to move in small, jerky motions, although you won't feel these movements until about your fourth month of pregnancy.
Your baby's growth spurt continues: In the last two weeks he has quadrupled in size. As he gets bigger, his delicate facial features are becoming more refined, with his ears, upper lip, and the teeny tip of his nose all clearly visible. His eyelids will also take shape for the first time this week and his heart is growing stronger by the day. Even though you still have to wait another eight weeks to find out if your new addition will be a boy or a girl, this week, your baby gets the goods she'll need to, well, make her own baby one day.
That's right -- reproductive organs are beginning to form now, along with some other key organs, like the pancreas and gallbladder. At this point your baby has doubled in size and her head, which is about half the length of her entire body, is tucked down toward her chest.
Her tiny fingers are growing longer, and the ends are slightly enlarged right now -- this is where those unique fingerprints will ultimately form. Up until now your baby was classified as an embryo, but by the end of this week he will be a fetus and lots of changes are on the way. Paddle-like, or webbed, hands and feet will now separate into fingers and toes, bones will begin to harden and his kidneys are now producing urine.
Most impressive? At this point your baby's brain is developing at astounding rates -- nearly , neurons are forming every minute! The end of the embryonic stage also marks a turning point for development dangers -- your baby is much less susceptible to them now.
Did you know your baby can breathe underwater? She's doing it right now. At weeks 10 and 11, the fetus will start to inhale and exhale small amounts of amniotic fluid, which helps your baby's lungs to grow and develop. Also this week, your baby's ears are scooting up to the sides of his head. Sure, your baby's head is still disproportionally large compared to the rest of his body, but this will even out as he continues to grow and develop in the womb.
As your baby's muscles start to bulk up at this stage, he's getting busy stretching and kicking. When you put your hand on your belly, your baby will likely wiggle in response because his reflexes are starting to develop -- though it's too early to feel his movements. He'll also start to open and close his fingers, curl his toes, and jerk and kick his arms and legs. Your baby is constantly getting bigger and cuter, and his face is looking more human-like every day.
His ears have moved up from his neck into place and his eyes -- which are looking more and more like your baby blues or browns, or greens -- have moved from the sides of the head to the front of the face.
Up until now, his head has been outpacing his body, but now his body is growing faster. His legs still need to grow longer, but this week his arms will lengthen to be proportionate with his body, and he'll be able to stick his thumb in his mouth.
Also by now, all of your baby's essential organs and systems have formed. The roof of your baby's tiny mouth is fully formed now, and her constant sucking reflexes are helping to create full, cherubic cheeks. If you're having a boy, the prostate is forming, and if you're having a girl, her ovaries are moving down into her pelvis. Lanugo, your baby's first ultrafine, downy hair, now covers his back, shoulders, ears, and forehead. It helps him retain body heat, but once he gains enough fat to do the job, this hair will fall off -- probably before birth.
Facial expressions are your baby's newest trick -- he can frown, squint, grimace and wince. Don't worry -- he's just flexing his facial muscles, not indicating his mood. Your baby's delicate skeleton continues to harden from rubbery cartilage to bone. Even so, his bones will remain somewhat flexible for an easier trip through the birth canal. The umbilical cord has fully matured with one vein and two arteries that are protected by Wharton's jelly a thick substance that makes the cord slippery so it can move freely around your baby.
By the way, if you're having a girl, hundreds of thousands of eggs are forming in her ovaries this week -- your future grandchildren! Finally, your baby's arms, legs, and trunk have caught up to the size of his head. Baby starts plumping up this week, as body fat is deposited under his skin and sweat glands develop. Also worth noting: The placenta is almost as big as your baby. Fifth month. Sixth month.
Seventh month. Eighth month. Ninth month. Tenth month. Eleventh month. Twelfth month. When to talk with your pediatrician. The takeaway. Parenthood Baby. Read this next. Babies learn by mimicking , so replay their sounds back to them to promote newborn developmental milestones. Week 5: This week, your baby's movements become smoother and more purposeful, and those random jerky motions begin to disappear. Set aside time each day for using their body—for example, you can give them a gentle mini-workout by slowly pulling them to a sitting position, or let them "fly" by resting them tummy-down on your forearm.
Always support their head during movements. Week 6: At this age, your baby will flash an adorable gummy grin that's their first genuine smile. How can you tell? Their eyes will brighten and widen as they move their mouth upwards. Week 7: As another infant milestone, your baby will start understanding senses ; they can look at a rattle and connect it to the sound it makes. They're also becoming partial to color, preferring bright hues and three-dimensional objects over flat black and white ones.
Week 8: While your little one's head is still wobbly, those neck muscles are getting stronger by the day. In fact, your baby can probably lift their head about 45 degrees.
Put them on their stomach for brief periods every day so they can practice. Week 9: Sounds fascinate your baby, especially high tones and pitches. They're also interested in hearing you talk, and will stare intently at your mouth as you speak to them.
They may even reply with cooing or "goo"-ing. Week Around week 10, your baby can pick out their parents' faces in a group. When someone familiar comes near, they might respond with wide eyes and gleeful wiggling. They're ready to hone their social skills , so include them in family activities—for example, bring them to the table during dinner, or put them in a carrier sling while you work.
Week Your baby stays awake for longer periods of time now. They're anxious to learn about the world, and they may not always be interested in your choice of game. If they turn their head and look away, they're ready to move onto something else. Week At this fun baby stage, your little one has discovered an endless source of enchantment: their hands.
They've realized that those fingers and thumbs are separate objects. They can also bring their hands together, look at them, then put them to their mouth to taste.
Let them experiment with these wonderful tools by offering different textures for them to feel, such as a velvet scarf or a rubbery toy. Week Besides bestowing sweet smiles and coos on you, your baby may be laughing , chuckling, and babbling in long chains. These baby development milestones are absolutely adorable! Week Rattles and dangling toys do more than amuse your baby at 14 weeks; they also develop their hand and eye skills.
Your infant is also intrigued by multi-textured toys, bright primary colors, and things that make sounds. They'll bat or grasp them they'll also try to put them in their mouth! Week Say good-bye to a relatively stationary baby. Around week 15, your little one may start rolling over —either from back-to-front or front-to-back. In the coming weeks, they'll likely master rolls in one direction. As a safety precaution, make sure they're never left alone on a bed or high surface.
Week Your little one is getting stronger by the day. They may protest when placed on their stomach, but they need tummy time every day for exercising their neck, chest, rib cage, and arm muscles. These muscle groups are necessary for rolling over, sitting up, and crawling. Join them on the floor and talk outside of their range of vision. They'll be distracted from fussing for a few minutes while they're busy looking for you! Week Your baby probably entertains everyone including themselves by making razzing noises or blowing raspberries.
They'll laugh when you tickle their belly, and they'll mimic your words by making similar sounds. Boost both their ego and speech skills by chatting and making eye contact with them whenever possible.
Week Around this point in your baby development timeline, you may be pleasantly surprised to find them peacefully playing alone. Their eyesight is sharp now, and their depth perception is also improving. They're very busy using their eyes and hands in play to learn about themselves. Week Your baby's dad claims that he distinctly heard "daa daa.
You can help them connect sounds with meanings by labeling things: point to pictures in their books, and touch their eyes, nose, and mouth while naming them. Larger text size Large text size Regular text size. You know your baby best.
Share your concerns — even little ones — with your baby's doctor.
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