Your baby is starting to transform from a precious-but-super-sleepy newborn to an nearly full-fledged babe. And with all that growth and evolution happening, there are some large changes and milestones coming down the state highway.

And then go excited! Payback for the sleep deprivation you're probably dealing with is on its way. Here'southward what you can expect forward to this week.

Your iii-week-quondam baby'south development

At a Glance

Sleeping basics

Newborns upward to 3 or 4 months old need 14 to 17 hours of sleep in a 24-hour catamenia, usually waking every two to four hours to eat.

Feeding basics

Breastfed babies should eat as much equally they want at this age, but a general rule of thumb is roughly xvi to 24 ounces of breast milk or formula in 24 hours.

Did you know?

Your petty one is gaining musculus command, so those movements and reflexes will become less jerky and more graceful this calendar week.

Your little one is getting stronger every mean solar day — and you lot can encourage baby to flex those muscles past providing ample supervised breadbasket time during the mean solar day so she tin practice lifting that beautiful head.

Some 3-weekers volition be able to lift their heads 45 degrees when on the tummy, and the more exercise baby gets, the better.

Tummy time will besides help forestall head flattening, something more common in babies who spend all day and dark lying on their backs or propped in bouncers and car seats.

In brain-related news, your baby is set for more complex shapes (cheerio-bye circles, hullo zigzags!) as vision, the ability to focus, and concentration improve chop-chop. She may really love gazing at a mobile or a  soft toy y'all agree up shut enough so she tin see it.

Of course, when she's not in the mood to play, she might be in the mood to cry (and weep). All babies cry, but some babies wail more others.

In fact, at that place are newborns who sob inconsolably for hours. Doctors will generally diagnose such crying equally colic when information technology lasts for at least three hours at a time, at least three days a week, over the class of at least iii weeks.

Your 3-week-one-time baby'south growth

Your cutie is surely packing on the pounds and ounces at present that she's three weeks erstwhile. But when taking annotation of your little 1'southward weight, stop yourself from comparing it to your BFF'southward baby'southward weight, or your sister's, or ... you get the idea.

That's because the near important measure of your baby'due south growth isn't how she stacks up to other babies, merely rather how she stacks upwardly to her ain weight and pinnacle curve.

The pediatrician will want to follow your babe'south growth trends over time. The doctor will look closely to brand sure your little one is trending on relatively the same curve she's been on (whether that's the 15th percentile, the 50th percentile or the 90th percentile).

A large jump (say, from the 20th percentile to the 50th percentile) tin can mean that baby'southward gaining too fast. A big dip can mean she isn't getting enough to eat.

Your babe's doctor volition help you make sense of these percentiles and how your babe is growing.

Your 3-week-old babe'south health

There are no well-baby visits or shots this week (hurray!), merely there'southward still plenty going on with your baby's health.

Spitting-up baby

Don't be alarmed if baby is spitting up a lot. What looks like her unabridged lunch is probably no more than a tablespoon of milk. Things should calm downwards in a month or two. Read More

Infant fevers

A mild fever under 100.4 degrees Fahrenheit in babies this age is usually null to worry about, but a temp of 100.four degrees F or college warrants a phone call to the physician correct away. Read More

The scoop on poop

If your babe is breastfed, her bowel movements volition probably be mustard-colored, loose and sometimes seedy. In formula-fed babies, the stool will be probably be soft, and can range anywhere from stake yellowish to xanthous brown, light brown or brownish green. Read More

Crib safety

Your baby will be spending a lot of fourth dimension in that crib, then you'll want to make sure information technology'south condom. A crib should meet the latest standards set by the Consumer Product Safety Committee (CPSC). Read More

Vitamin D for baby

Newborns (and older babies) demand 400 IUs of vitamin D each solar day. If your babe is breastfed, she'll need to accept vitamin D drops. While formula is already supplemented with vitamin D, enquire your pediatrician if you should add vitamin D drops to your formula-fed infant'south bottle. Read More

Postpartum & new infant tips

Milk bank FAQs

If yous're non able to breastfeed, and your baby has a medical condition that requires human milk (including prematurity, failure to thrive, an intolerance to formula or allergies), in that location are ways to get donated breast milk from other moms through a milk banking concern.

Here's what yous'll desire to keep in heed as y'all brainstorm your search:

  1. As tempting every bit it may be, best friends (or even casual ones) shouldn't go breast friends. The American University of Pediatrics (AAP), La Leche League and other experts frown on moms casually breastfeeding one some other'southward babies and for good reason: There's always a chance that your pal could unwittingly pass on a virus for certain illnesses like Lyme disease or hepatitis. There's also the chance that the shared milk could contain medications if your friend is taking whatsoever.
  2. Practice consider buying from a milk bank. Dissimilar an informal system between moms, the milk banks in the U.S. accept strict guidelines — guidelines that were set up by the Human Milk Cyberbanking Association of North America (HMBANA), an system of pediatricians and other health care workers. The guidelines regulate donors also as the way milk is nerveless and stored.
  3. Calculate the costs and get some financial assist if you need it. Buying donated milk is expensive. Although nursing moms donate their milk for free, the milk, which the guidelines state can be obtained simply with a prescription from your doctor, costs nearly $iii an ounce.

Soothing baby's peel

While older babies are known for their smooth complexions, 3-week-olds definitely aren't.

Amidst the conditions that may exist keeping the skin your baby's in colorful but less-than-flawless: cerise pimples and whiteheads (didn't expect those until middle school at least?), pink diaper rashes, flaky cradle cap and purplish mottling (non to worry — it's just a sign of your baby's immature apportionment).

Fortunately, all these baby peel imperfections are temporary. Some, similar the pimples and mottling, will go away on their own; others, like diaper rash and cradle cap, will respond well to treatment. Clear baby skin is merely around the corner.

Fecal incontinence

Labor and delivery, equally you lot might have noticed, are actually crude on your body — especially "downwards there." Your perineum muscles and nerves may be stretched or damaged, making information technology difficult for you to control how and when digested food leaves your body.

Postpartum fecal incontinence usually takes care of itself as your body returns to normal. Until then, here are a few steps you can take to alleviate this problem:

  1. Eat a gas-conscious nutrition. Skip difficult-to-digest foods for now (nothing fried, no beans, no cabbage), and avoid overeating or eating on the run.
  2. Practice your Kegels. So do them once again…and once more. Kegels are just the ticket for tightening up those muscles, every bit well as the ones that control urine, which may also be leaking these days.
  3. Don't exist shy. Talk to your practitioner if the problem persists. Your health care provider might suggest a heed-body technique chosen biofeedback or peradventure surgery if the state of affairs is particularly bad, which it rarely is.

Newborn care during outings

It pays to be extra careful for the first calendar month — the younger your baby, the less fourth dimension that tiny immune system has had to strengthen. (That goes double for infants built-in prematurely or with other health concerns.)

And so in those early on weeks, avoid crowded areas. Inside or out, go on your babe in a stroller, sling or carrier. And after any outing, clean your babe'due south hands with a wipe or wet, soapy cloth.

Baby mixing upwards day and night?

If your little one keeps mixing up day and night, try these tips:

  1. Limit daytime snoozes to three-hour stretches. That way she won't become into the addiction of bunching up slumber during the day. Even though your newborn doesn't have a naptime routine even so, yous probably will want to wake your baby up to consume every 3 to four hours or so anyway at this age. If you accept trouble rousing your drowsy darling, attempt these tactics: Concur your baby upright, unswaddle your piddling one, strip off some clothes, tickle those little anxiety or easily, stroke that beautiful face, move baby's artillery and legs, or put a cool washcloth on the forehead. If all else fails, endeavor changing baby'southward diaper — that's usually a surefire way to wake up a picayune sleepyhead. In one case she'due south awake, go on your little one warning past singing upbeat songs and dangling toys in front of baby's face.
  2. Make your newborn's naptime routine slightly dissimilar from the nighttime one to assistance your infant distinguish betwixt the two. Though you'll want to establish a current of air-down routine for naps that's similar to the one you use at bedtime, adjusting information technology a bit during the solar day can clue your baby in that it's not time to plow in for the night. Keep a shade or curtain open up a piffling, for instance, so the nursery's not pitch-dark. And don't go overboard in terms of tiptoeing around while she'due south napping, either (though you lot should do the opposite at night). Hearing some ordinary sounds while she's snoozing, within reason, can assist reinforce the divergence between day and nighttime.
  3. Don't ditch naps. While it is important to teach your sleeping angel that nighttime is the best time for snoozing in long stretches, she'll all the same need to fit in some shut-centre during the day. The average baby sleeps at least 14 to 17 hours in a 24-hour period, so lots of that infant rest needs to happen during the 24-hour interval. And be grateful that your baby seems to know how to power-nap at all — it's a good sign that she'll acquire how to sleep through the nighttime in the non-too-distant future.

Hand washing for friends

Your friends and family are probably as excited to run across your newborn as y'all are to testify your piffling bundle off.

But be sure to gear up and enforce this simple basis rule: All admirers who want to touch or hold your infant must wash their easily first — and anyone who is clearly sick or has a rash should stay (far) away.

Arraign your pediatrician or your own paranoia, but get your bulletin across. Be especially careful with minor children, who could be carrying all sorts of contagious stuff.

Teach them to gently pat your baby'southward back or touch her tiny toes, but never the hands or face. And after whatsoever outing or social scene, make clean your baby's hands with a wipe or moisture, soapy cloth.

Babe'southward cries, explained

Near babies option a fussy menstruum during the afternoon or early on evening as their "witching hour" to permit it all out and weep for a while.

If the crying is colic (which it isn't always), it may seem like those babies are in pain. I theory is that colicky babies are likewise gassy babies, though they might exist gassy because they're swallowing a lot of air from all that crying or because newborns often struggle with gas hurting considering of their young digestive systems.

Colicky babies also often seem to desire to eat all the time — merely sometimes that's because the sucking is soothing, not considering they're hungry. Using a pacifier can help.

Your baby's tearful bouts could be a sign that she's overstimulated. Babies this age often need to unwind with a expert cry at the end of the day.

She could likewise be hungry more ofttimes because she's going through a growth spurt or for some other reason. Check with your pediatrician if you suspect hunger is the cause.

If your baby does seem to be in pain, check for fever and call the doc. Information technology'due south possible that she'south coming downward with something.

But if it'southward colic that she's coming down with, it'southward probably here to stay, to some degree, for the next few weeks or months. And if it'due south hunger, work with your pediatrician to figure out whether whatsoever adjustments in the feeding section are in society.

From the What to Await editorial team and Heidi Murkoff, author ofWhat to Await When You're Expecting. What to Wait follows strict reporting guidelines and uses simply credible sources, such as peer-reviewed studies, academic research institutions and highly respected health organizations. Learn how we go on our content authentic and upwardly-to-date by reading our medical review and editorial policy.

  • What to Await the Start Year, 3rd edition, Heidi Murkoff.
  • WhatToExpect.com, Colic in Babies: Signs, Causes and Tips for Parents, November 2020.
  • WhatToExpect.com, Agreement Babe Growth Charts, Dec 2018.
  • WhatToExpect.com, Crib Safety, Baronial 2020.
  • WhatToExpect.com, What to Do if Your Baby or Toddler Has a Fever, October 2020.
  • WhatToExpect.com, Spitting Up Infant, Dec 2018.
  • WhatToExpect.com, Newborn and Baby Poop, August 2020.
  • WhatToExpect.com, Vitamin D for Babies, October 2020.
  • WhatToExpect.com, How Much Should My Baby Consume?, Apr 2020.
  • WhatToExpect.com, Here's How Much Sleep Babies Need, June 2020.
  • WhatToExpect.com, Newborn and Baby Sleep Nuts, May 2020.
  • American University of Pediatrics, Back to Sleep, Tummy to Play, Jan 2017.
  • American Academy of Pediatrics, How to Read a Growth Chart: Percentiles Explained, September 2015.
  • Mayo Clinic, Colic, February 2020.
  • American Academy of Pediatrics,Pediatrics in Review, Colic, July 2012.

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