The first month is the steepest learning curve most parents will ever face — and most of it is learnt by doing, not by reading. From the clinical side, the things that genuinely matter in those four weeks are short and specific. Most of what worries parents turns out to be normal newborn life. For a wider view, see our complete guide to child health.
What the Professionals Are Watching
A baby born in a UK hospital has multiple checks before they leave: Apgar at 1 and 5 minutes, weight and measurements, and the NIPE (Newborn and Infant Physical Examination) within 72 hours. The NIPE covers heart sounds, hip stability, the eye red reflex, testicular descent in boys, palate, spine, and tone. The repeat NIPE comes at 6–8 weeks via the GP.
Once you're home, the midwife visits at home for the first 10–14 days — usually day 1, day 5 (with the bloodspot), and a final visit before handover. The health visitor then takes over and remains your main contact for routine reviews up to age five.
Two screening tests slot into this window:
- Newborn bloodspot screen (heel-prick): done around day 5. Screens for nine conditions — congenital hypothyroidism, sickle cell disease, cystic fibrosis, PKU, MCADD, MSUD, IVA, GA1, HCU. Results take roughly 6 weeks; you only hear back if something needs follow-up.
- Newborn hearing screen: automated otoacoustic emission test, done before discharge or at home in the first few weeks. A "refer" on first attempt is usually noise or fluid — most repeat normally.
The 6–8 week check is a GP appointment for both you and the baby. The baby gets the second NIPE; the parent gets a postnatal check including mood screening (the Edinburgh Postnatal Depression Scale or similar). Vaccinations begin around 8 weeks (6-in-1, rotavirus, MenB, PCV).
The Three Things That Actually Matter
1. Is the Baby Feeding and Gaining Weight?
This is the hinge for almost every other concern in month one. Up to 10% loss in the first three to five days is expected. Most babies are back to birth weight by day 10–14, then put on roughly 150–200 g a week for the first three months.
Practical signs that feeding is working:
- Six or more wet nappies a day from day five or six (use the 30 ml water test if unsure how heavy a "wet" disposable should feel)
- Yellow seedy stools by the end of the first week in breastfed babies; tan formed stools in formula-fed
- Active sucking with audible swallowing (you can hear the gulping in a feeding breastfed baby)
- The baby relaxed and either sleepy or alert after a feed, not still rooting
If breastfeeding is painful — anything more than a brief twinge in the first few sucks — that's a sign to get hands-on help. Tongue-tie, latch issues, and shallow attachment are all common in week one and almost all are fixable. Lactation consultants, the National Breastfeeding Helpline (0300 100 0212), and your midwife are who to ask. Earlier is much easier.
2. Is the Baby Jaundiced?
About 60% of term newborns develop visible jaundice. Most is physiological — appearing day 2–3, peaking day 4–5, gone by 14 days — and needs nothing more than feeding well.
The jaundice patterns that need active assessment:
- Any jaundice in the first 24 hours of life (always pathological, often blood group incompatibility)
- Yellow that is deep, orange, or visibly worsening day to day
- Jaundice extending below the umbilicus (a rough rule of thumb: more body involved = higher bilirubin)
- A jaundiced baby who is sleepy, feeding poorly, or dehydrated
- Jaundice persisting past 14 days (or 21 days in breastfed babies) without confirmation
When bilirubin is high enough to risk neurological harm (kernicterus is the worst-case outcome), the treatment is phototherapy — blue LED light at a specific wavelength, perfectly safe and routinely effective. Hospitals also have at-home phototherapy units in some areas.
Pale stools and dark urine in a jaundiced baby are a red flag for biliary atresia and need urgent assessment — that combination is rare but time-critical because the surgical repair window closes around 8 weeks.
3. Is the Baby Sleeping Safely?
Following the Lullaby Trust safer-sleep guidance reduces the risk of Sudden Infant Death Syndrome substantially. The core points:
- Back to sleep, every sleep — naps and night
- Own sleep space — cot, Moses basket, or bedside crib — in the same room as you for the first six months
- Firm, flat mattress; no soft bedding, pillows, duvets, or cot bumpers in the first year
- Feet at the foot of the cot, light blanket no higher than the shoulders, or use a sleep bag
- Room temperature 16–20°C
- No smoking — anywhere near the baby, in the home, or on clothes (third-hand smoke counts)
- Avoid bed-sharing if either parent has been drinking, taken medication that causes drowsiness, smokes, is exhausted, or if the baby was premature or low birth weight. Falling asleep on a sofa or armchair with a baby is consistently the highest-risk sleep environment and should be avoided altogether.
First-Month Worries That Are Usually Normal
"My baby keeps bringing up milk." Reflux is near-universal in newborns — the lower oesophageal sphincter is loose and matures over the first year. If the baby is comfortable, gaining weight, and not in pain, no treatment is needed. Forceful or projectile vomiting (especially after every feed and getting worse, in a baby around 3–6 weeks old) raises the question of pyloric stenosis and needs same-day assessment.
"My baby will only sleep on me." Biologically programmed. Newborns spent 9 months held continuously and the transition takes weeks. Use safe carriers, take turns, and accept help. Independent sleep develops gradually — there's no reasonable expectation of it in week two.
"My baby's belly button looks odd." The umbilical stump dries out, blackens, and falls off between day 7 and day 21. A small amount of dried blood when it separates is normal. Keep it clean and dry with normal water — no need for surgical spirit. The stuff to act on: redness spreading more than 1–2 cm onto the skin around the cord (omphalitis — needs same-day GP review), pus, or a foul smell.
"My baby's skin is peeling." Particularly noticeable in babies born at or past 40 weeks and those born post-dates. The vernix kept the skin hydrated in the womb; once exposed to air, it dries and sheds. Resolves on its own; moisturiser is optional but harmless.
"My baby's eyes are sticky." Blocked tear ducts (nasolacrimal duct obstruction) affect about 20% of newborns. The duct usually opens by 12 months. Gentle massage along the side of the nose with a clean fingertip a few times a day can help. The combination of pus, redness of the white of the eye, and swelling of the lid points to conjunctivitis — that needs a GP review and often antibiotic drops. Bilateral persistent stickiness from day one in a brand-new baby can occasionally be ophthalmia neonatorum (gonococcal or chlamydial) — same-day review.
"My baby's breasts/genitals look swollen." Mild breast enlargement (sometimes with a drop of "witch's milk") in newborn boys and girls, and prominent labia or scrotal swelling, are caused by maternal hormones crossing the placenta. They settle over a few weeks.
When to Get Help Without Delay
Call NHS 111, your GP urgently, or 999 (or go to A&E) if:
- Temperature above 38°C or below 36°C in a baby under three months
- Breathing fast (over 60 a minute at rest) or with effort — chest recession, grunting, nasal flaring
- Blue lips or tongue (not just hands and feet)
- Floppy or unusually difficult to wake
- Refused all feeds for more than six hours
- Increasingly yellow, especially with sleepiness or pale stools
- Bulging fontanelle in a calm, upright baby
- A non-blanching rash (won't fade under glass pressure)
- Any of these on a gut feeling that something is genuinely wrong, even without a textbook sign
The first month is hard work, and asking for help — from the midwife, the health visitor, NHS 111, your partner, your mum, anyone — is part of how it goes well, not a sign that it isn't.
Key Takeaways
The first-month priorities are simpler than they look: feeding well, gaining weight, staying out of the jaundice danger zone, and sleeping safely. Six wet nappies a day from day five and a return to birth weight by 14 days are the practical green lights. Any fever in a baby under three months — including 38°C exactly — is a same-day call to NHS 111 or the GP. The umbilical stump usually drops off between days seven and 21; redness spreading outward from it is the only red flag worth memorising. Most worries that bring parents to the surgery in month one — spit-up, peeling skin, sticky eyes — turn out to be normal.
