First 3 Days After Birth: Normal vs Concerning Signs
In the first 72 hours, newborns adapt: feeding increases, weight may decrease slightly, and jaundice often appears around Day 2–3.
By Dr. Tamar (Tuto) Baramidze · 5 min read
Quick Answer
In the first 72 hours, newborns adapt: feeding increases, weight may decrease slightly, and jaundice often appears around Day 2–3. These changes are normal. Poor feeding, fever of 38°C or higher, breathing problems, or lethargy require medical evaluation.
Day-by-Day Overview
Day 1
On the first day, most newborns are very sleepy. This is normal — birth is physically demanding, and the body is adjusting to breathing air, regulating temperature, and processing the first feeds. Expect small feed amounts. Colostrum, the first milk, is produced in teaspoon-sized volumes, which is appropriate for a newborn's stomach at this stage.
What you want to see is that your baby attempts to feed when offered, and that you can observe swallowing. A baby who shows no interest in feeding at all, or who cannot be roused to attempt a feed, needs medical attention.
Day 2
By Day 2, most babies become more alert and begin feeding more frequently. The feeding pattern typically increases to 8–12 times in 24 hours as milk transitions from colostrum toward mature milk. This increase in demand is normal and expected.
Jaundice — a yellow tint to the skin — often begins to appear on Day 2. Mild jaundice starting on Day 2 or later is common and, in most cases, resolves on its own. Jaundice that appears within the first 24 hours, or that deepens rapidly, requires prompt medical assessment.
A baby who is not waking for feeds on Day 2, or who is too sleepy to feed effectively, should be seen by a doctor.
Day 3
Day 3 is typically when weight loss peaks. Newborns commonly lose up to 7–10% of their birth weight in the first days as they pass meconium and adjust fluid balance. This is expected. Most babies begin to regain weight by Day 4–5 once feeding is established.
Feeding usually improves on Day 3 as milk supply increases. If feeding is still poor, if the baby is lethargic, or if weight loss appears to be continuing beyond expected levels, a clinical assessment is needed to check hydration and feeding effectiveness.
What a Doctor Evaluates in the First Days
When a doctor assesses a newborn in the first 72 hours, they are looking at several things together — not any single sign in isolation.
Feeding is evaluated by frequency, effectiveness, and the baby's behavior around feeds. A doctor checks whether the baby is latching, swallowing, and showing hunger cues, and whether the feeding pattern is appropriate for the day of life.
Weight is compared to birth weight to calculate percentage of loss. A loss of more than 10% raises concern and requires closer monitoring or intervention.
Jaundice is assessed by timing, distribution across the body, and in some cases by a bilirubin measurement. Jaundice spreading to the chest or limbs, or appearing very early, is evaluated more carefully.
Breathing and general condition includes respiratory rate, chest movement, skin color, muscle tone, and alertness. These give a picture of how well the baby is adapting overall.
This combination of findings — not one symptom alone — guides what happens next, and the day-by-day newborn guide provides detailed expectations for the full first week.
What Is NOT Normal
Contact a doctor if your baby:
- will not feed or makes no attempt to feed
- is consistently hard to wake
- has breathing that is fast, labored, or noisy
- has a temperature of 38°C or higher
- shows jaundice in the first 24 hours, or jaundice that is spreading quickly
When to Call 112 Immediately
If your baby shows any of these signs, call 112 immediately. Do not wait for a WhatsApp reply.
Call 112 if your baby:
- is having difficulty breathing
- has blue or gray lips, tongue, or face
- is unresponsive or cannot be woken
Related Guides
- What to Do in the First 24 Hours with a Newborn
- Newborn Check in the First Days: When You Need a Doctor in Tbilisi
- Is My Newborn Eating Enough?
FAQ
Is it normal for a newborn to lose weight in the first days?
Yes. A weight loss of up to 7–10% of birth weight is expected in the first few days. Most babies begin regaining weight by Day 4–5.
When does jaundice typically appear?
In most cases, Day 2–3. Jaundice appearing in the first 24 hours is not typical and should be evaluated the same day.
When does feeding start to improve?
Typically by Day 3, as milk supply increases. If feeding is still poor by Day 3, a clinical check is needed.
What does a doctor assess in the first 3 days?
Feeding effectiveness, weight relative to birth weight, jaundice level and distribution, breathing, and the baby's overall tone and alertness.
Evidence Base / Sources
Dr. Tamar (Tuto) Baramidze
Pediatrician & Neonatologist, Tbilisi
20+ years of experience in newborn and pediatric care. Trusted by families from 30+ countries.
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