Month 4 of Pregnancy

Video Transcript

WebMD Pregnancy App.

Your baby grows and changes fast during your second trimester. Hither's an within peek at her amazing progress! Past week 13, she'south as large as a lemon -- about 3 inches long. And she'due south learning how to eat by taking an occasional gulp of the amniotic fluid around her. Adjacent week, she's a little bigger -- the length of a bell pepper. Just by week 15, your baby could be the size of a big russet potato -- around 6 inches long. Her bones become harder and stronger during week xvi. Now she can flex her artillery and legs. Plus, her eyes can slowly motion around behind closed lids. Next calendar week she's the size of an asparagus spear -- almost viii inches long. And she's on the move, doing flips and rolls. She tin also make a fist and hold it to her oral fissure. Her confront gets more defined during week 18. Those fiddling eyelids, ears, and upper lip all come up into sharper focus. Plus, she can hear sounds now. Your lilliputian one maybe over nine inches long -- almost the size of an eggplant -- by week 19. Her lungs' main airways start to form. Something super ambrosial happens in week 20 -- your infant puts her feet and toes in her rima oris. She too gets lots of sleep. Dissonance and movement can wake her up -- so keep it down, would ya? (Just kidding.) Next calendar week your ten and 1/2-inch tot is making strong kicks and turns. She'southward too forming brown fat for warmth. Your baby's genitals are completely formed around calendar week 22. It'southward possible to come across her eyebrows now, besides. And soft, warm hair called lanugo covers her. By week 23, her fingers and toes look similar tiny versions of yours -- and they've got fingerprints. Plus, your little one at present has a secret talent: she can hiccup. At calendar week 24 your baby is pineapple-sized -- about 12 1/ii inches long-- and 1 i/2 pounds. She could survive exterior your womb if she was born now. Your piddling one knows the sound of your voice at calendar week 25. She tin recognize other familiar sounds likewise ... when she's not sleeping. She snoozes fourscore% of the time now. Past side by side calendar week, she knows how to suck -- and she'll probably try that skill out on her thumb. At the stop of your second trimester on week 27, your little one is the length of an English language cucumber -- over 14 inches long. And all that moving around is paying off, giving her more and more than muscle tone.

In the 2nd trimester of pregnancy -- months iv, 5, and vi -- your baby'due south fingers and toes are well-defined. Their eyelids, eyebrows, eyelashes, nails, and hair are formed, and teeth and bones are condign denser. Your baby tin even suck their pollex, yawn, stretch, and make faces.

The nervous system is starting to function at this betoken in pregnancy. The reproductive organs and genitalia are at present fully adult, and your health care provider can encounter on ultrasound if you are having a male child or a daughter. Your baby'southward heartbeat may at present be audible through an instrument called a Doppler.

By the finish of the fourth month, your baby is nigh six inches long and weighs about 4 ounces.

16 Weeks

Calendar month 5 of Pregnancy

Hair is beginning to grow on your babe's head, and lanugo, a soft fine hair, covers their shoulders, back, and temples. This pilus protects your baby and is commonly shed at the end of the baby's first week of life.

Your baby's pare is covered with a whitish coating called vernix caseosa. This "cheesy" substance, thought to protect baby's peel from long exposure to the amniotic fluid, is shed only before nascence.

You may begin to feel your babe move, since they are developing muscles and exercising them. This first move is called quickening.

By the end of the fifth calendar month of pregnancy, your infant is well-nigh 10 inches long and weighs from 1/2 to ane pound.

Now that you lot've read about your baby's development in the get-go xx weeks of pregnancy, take this quiz to examination your smarts!

20 Weeks

Calendar month 6 of Pregnancy

By the end of the 6th month, your baby is about 12 inches long and weighs about 2 pounds. their peel is reddish in color, wrinkled, and veins are visible through the infant's translucent skin. Baby's finger and toe prints are visible. The eyelids brainstorm to office and the eyes open.

Your baby may reply to sounds past moving or increasing the pulse, and you may notice jerking motions if baby hiccups.

If born prematurely, your baby may survive subsequently the 23rd calendar week of pregnancy with intensive intendance.

24 Weeks