Neonate: what it means and why the first 28 days matter
In this article
Neonate is the medical word for a newborn baby in the first 28 days of life, the stretch the WHO calls the newborn period. You will see it on discharge notes and in words like neonatal jaundice and neonatology, the specialty that cares for newborns. The WHO calls the first month the most vulnerable time for a child's survival, which is why these weeks are watched so closely.
| Neonate | A baby in the first 28 days of life |
|---|---|
| Neonatal period | Those same 28 days, the WHO says |
| Infant | A baby under 1 year, the WHO says |
| Neonatology | The medical specialty for newborns |
| NICU | Neonatal intensive care unit |
| First check after discharge | Jaundice review within the first 5 days, NUH says |
Where you will see the word neonate
Neonate turns up in a lot of hospital words. Neonatal jaundice is the yellow colour many babies get in the first week. A neonatologist is a children's doctor who specialises in newborns. The NICU, or neonatal intensive care unit, looks after babies who are premature or unwell. KKH says its NICU is the largest in Southeast Asia, and it takes babies referred from other hospitals too.
Once the first 28 days are over, your baby is no longer a neonate but is still an infant. The WHO uses infant for babies under one year.
What is checked before your baby goes home
A lot happens in the first two or three days. KKH says part of the cord is used after delivery to draw blood for screening tests, including G6PD, thyroid function and blood group. NUH lists the newborn screening as G6PD deficiency, congenital hypothyroidism, hearing loss and inborn errors of metabolism, and says your doctor will tell you if any result is abnormal.
Two vaccines usually come before discharge. KKH says the Ministry of Health strongly recommends hepatitis B and BCG for all babies after birth, and both go into your baby's health booklet and the National Immunisation Registry. KKH also waits 24 hours before your baby's first bath, following the WHO's advice on keeping newborns warm.
Your baby's first four weeks at home
The checks carry on after discharge. NUH says your baby needs an early jaundice check within the first 5 days, then is usually next seen around 6 weeks for vaccinations and a health check, with a 2-week visit in its well-baby schedule. KKH says you can do the routine jaundice and well-baby checks at the polyclinic nearest your home, and asks you to bring the health booklet to every visit.
Day to day, NUH says newborns can sleep up to 16 hours a day and often mix up day and night. It also expects your baby to have at least 5 to 6 wet nappies by discharge. The cord stump usually drops off within 2 weeks, NUH says. Our newborn care basics guide walks through feeds, sleep and baths, and the feed and nappy log keeps track of the numbers the nurse will ask for.
Signs a newborn needs a doctor quickly
Fever means more at this age. NUH says fever in a baby under 3 months is a medical emergency, defined as more than 37.5 degrees Celsius under the arm or 38.0 degrees by the ear, and asks you to bring your baby to the nearest hospital. Read fever in a newborn for more.
KKH lists other signs that need a visit to the polyclinic or the Children's Emergency:
- breathing that is faster, slower, noisier or harder work than usual
- vomiting that is green or projectile, not just spitting up
- refusing several feeds in a row
- being lethargic or unusually hard to rouse
- crying that will not settle
- an unusual rash or unusual movements
KKH adds that a temperature below 36.5 degrees should be checked again an hour later, and a doctor seen if it stays low.
Frequently asked questions
What is a neonate?
A newborn baby in the first 28 days of life. The WHO calls these 28 days the newborn period.
Is a newborn the same as a neonate?
Yes, in the first four weeks. Neonate is the medical word, and doctors use it for the same 28 days. After that your baby is called an infant until the first birthday.
What does a neonatologist do?
A neonatologist is a doctor who specialises in newborns. At KKH the neonatology team runs neonatal intensive and special care, newborn screening, the universal newborn hearing screen and follow-up for premature babies.
What is a NICU?
A neonatal intensive care unit, for babies who are premature or unwell. KKH says its NICU is the largest in Southeast Asia.
Related terms
- Neonatal Jaundice: Yellowing of a newborn's skin and eyes from bilirubin. Common and usually mild, but checked in every baby.
- Apgar Score: A score out of 10 given to your newborn at 1 and 5 minutes after birth to check if they need help.
- Preterm (Premature) Birth: A baby born alive before 37 completed weeks of pregnancy. In Singapore, about 8.5% of babies arrive this early.
- Low Birth Weight: A birth weight under 2.5 kg, from being born early, growing slowly in the womb, or both.
- Fever in a Newborn: A raised temperature in a baby under 3 months, which Singapore hospitals treat as a reason to come in straight away.
- Health Booklet: The Child Health Booklet every Singapore baby gets at delivery. It records growth, milestones and every vaccination.
- WHO - Newborn mortality (read 9 November 2026)
- WHO - To grow up healthy, children need to sit less and play more (read 9 November 2026)
- KKH - Neonatology (read 9 November 2026)
- KKH - After Delivery (read 9 November 2026)
- NUH - First Month Concerns (read 9 November 2026)
- KKH (via SingHealth) - Caring for Your Newborn Baby (read 9 November 2026)
