Newborns sleep most of the day, eat every few hours, and go through rapid physical changes in their first weeks of life. If you’re bringing a baby home for the first time, the learning curve is steep but manageable once you know what’s normal, what to watch for, and how to handle the basics.
How Much Newborns Eat
In the first week, a newborn’s stomach is tiny. Formula-fed babies take just 1 to 2 ounces per feeding, gradually increasing to 3 to 4 ounces by the end of the first month. Formula-fed babies typically eat on a fairly regular schedule, roughly every 3 to 4 hours. Breastfed babies tend to eat more frequently, often every 2 to 3 hours, because breast milk digests faster than formula.
The easiest way to tell whether your baby is getting enough milk is by counting diapers. By days 4 through 7, a well-fed newborn produces at least six wet diapers and three soiled diapers per day. If you’re consistently seeing fewer than that, it’s worth checking in with your pediatrician about feeding.
Weight Changes in the First Two Weeks
Almost all newborns lose weight in the first few days after birth. This is normal. Babies typically start regaining weight between days 3 and 5, and about 80 percent are back to their birth weight by two weeks of age. A weight loss of more than 10 percent of birth weight is the threshold that signals a need for closer evaluation, usually of feeding technique or milk supply. Your baby will be weighed at their first few checkups specifically to track this recovery.
Sleep Patterns and Safe Sleep
Newborns sleep roughly 16 to 17 hours a day, but rarely more than 1 to 2 hours at a stretch. Their sleep cycles are shorter than adults’, and they spend less time in deep, dreaming sleep. This means frequent wake-ups around the clock, which is biologically normal even though it’s exhausting for parents.
Safe sleep practices reduce the risk of sudden infant death. The core guidelines are straightforward: place your baby on their back, in their own sleep space (a crib, bassinet, or portable play yard) with a firm, flat mattress and a fitted sheet. Keep blankets, pillows, stuffed animals, and bumper pads out of the sleep area entirely. Avoid letting your baby sleep on a couch, armchair, or in a car seat or swing when they’re not traveling. Room-sharing without bed-sharing is the recommended setup for the first several months.
Umbilical Cord Stump Care
The remaining piece of umbilical cord dries out and falls off on its own, usually within 1 to 3 weeks. Until then, the goal is to keep it dry and exposed to air. Fold the front of the diaper down below the stump so it doesn’t trap moisture, or cut a small notch in the diaper’s waistband. Stick with sponge baths rather than full baths, and don’t swab the stump with rubbing alcohol unless specifically told to by your baby’s doctor.
If stool gets on the cord, clean it gently with a soapy washcloth, pat dry, and let it air out. A little bleeding or discharge at the base as it separates is common, but spreading redness, a foul smell, or pus warrants a call to your pediatrician.
Jaundice and Skin Changes
Jaundice, a yellow tint to the skin and whites of the eyes, is extremely common. It happens because newborns produce more of a pigment called bilirubin than their immature livers can process. Physiological jaundice (the typical kind) usually becomes noticeable around days 2 to 4 and resolves on its own. It tends to appear first on the face, then spreads down to the chest, belly, and legs as levels rise.
A separate pattern called breast milk jaundice can peak around weeks 2 to 3 and linger at low levels for a month or more. In most cases it’s harmless, but your baby’s bilirubin levels will be checked before you leave the hospital and at early follow-up visits. Frequent feeding helps move bilirubin out of the body faster.
Newborn Reflexes
Babies are born with a set of automatic reflexes that serve as both survival tools and indicators that the nervous system is developing normally. You’ll notice several of these in the first days:
- Rooting reflex: Stroking your baby’s cheek causes them to turn toward your hand and open their mouth, helping them find the nipple to feed.
- Moro (startle) reflex: A sudden noise or the sensation of falling backward makes your baby fling their arms outward, spread their fingers, and sometimes cry. This is a protective response and completely normal.
- Palmar grasp: Pressing a finger into your baby’s palm triggers a surprisingly strong grip. A similar reflex exists in the feet, where the toes curl around a finger placed beneath them.
- Babinski reflex: Stroking the sole of the foot from heel to toes causes the big toe to point upward while the other toes fan out.
These reflexes fade over the first several months as voluntary movement develops. Your pediatrician checks for them during early exams.
The Vitamin K Shot
Shortly after birth, your baby will receive a vitamin K injection in the thigh. Babies are born with very little vitamin K, which is essential for blood clotting. Without it, they’re at risk for a rare but dangerous condition called vitamin K deficiency bleeding, which can cause brain damage or death. A single shot eliminates that risk and is one of the most straightforward interventions in newborn medicine.
Warning Signs That Need Immediate Attention
Newborns can’t tell you what’s wrong, so knowing a few red-flag thresholds matters. The most important one: if your baby is younger than 2 months and has a rectal temperature above 100.4°F (38°C), go to the emergency department. Fever at this age can signal a serious infection that needs rapid evaluation.
Other signs to act on promptly include persistent difficulty feeding or refusing to eat, fewer wet diapers than expected, a yellow tint that deepens or spreads to the legs and feet, excessive sleepiness where the baby is hard to wake for feedings, or any difficulty breathing such as flared nostrils, grunting, or the skin pulling in between the ribs with each breath. When something feels off, trusting that instinct and calling your pediatrician is always reasonable.