About 2%–4% of newborns have a detectable heart murmur in the first days of life, and most early murmurs are harmless.

Middle-ear fluid is common in newborns; among babies who fail screening, about six in ten have it, and most clear within weeks to months.

Yes, newborn hiccups are common; most babies hiccup daily, usually after feeds, and they rarely signal a problem.

Colic affects about 1 in 5 infants, with estimates ranging from 5% to 40% depending on definition and study.

Autism isn’t reliably detectable in newborns; watch for delays in early social and communication milestones and talk with your pediatrician.

Newborn sleep is fragmented because feeds, diapers, and immature body clocks wake babies often; steady routines and safe sleep help stretch rest.

A newborn is too cold when body temperature falls below 36.5°C (97.7°F); aim for a room near 20–22°C (68–72°F) and check your baby’s chest.

Newborns can see from birth; look for brief eye contact, blinking to light, and startle to movement, then tracking faces by 6–8 weeks.

Newborn gas usually comes from swallowed air and an immature gut; feeding tweaks, burping, and time ease it unless red-flag symptoms show.

For newborn sleep, aim for 16–20°C (61–68°F); don’t let the room drop below about 16°C without extra layers or a sleep bag.