Newborn, day by day · Day 13
Newborn day 13: diapers, poop and feeding
Last reviewed November 2026 against AAP, CDC, NHS and WHO guidance · Sources
Quick answer
On day 13, expect 6 or more wet diapers and 3–4 or more poops (yellow). Most newborns feed 8–12 or more times in 24 hours, and formula-fed babies take about 2–3 oz (60–90 ml) per feed. It's a good day to jot down questions for the 2-week checkup. Every baby is different, so watch diapers and cues.
- Wet diapers
- 6 or more
- Poops
- 3–4 or more
- Feeds / 24h
- 8–12 or more
On this page
What's normal on day 13?
| What to expect | |
|---|---|
| Wet diapers | 6 or more |
| Poops | 3–4 or more (formula-fed: at least 1) |
| Poop color | Yellow and seedy (breastfed); tan to yellow (formula) |
| Feeds in 24 hours | 8–12 or more |
| Breast milk per feed | Often 2–3 oz (60–90 ml) if given by bottle |
| Formula per feed | About 2–3 oz (60–90 ml) |
| Milk | Mature milk |
| Weight | Back to birth weight for many |
How much does a 13-day-old eat?
Most babies are feeding 8–12 times a day, and formula-fed babies 2–3 oz (60–90 ml) per feed. Daily totals of around 16–26 oz (480–780 ml) are common in week 2.
Combo feeding? Track breastfeeds and bottles in one place so you can see the full picture at the checkup.
How many diapers should a 13-day-old have?
6 or more wet diapers with pale urine, and several yellow poops for breastfed babies. Formula-fed babies should have at least one a day.
See every day side by side in wet diapers by day and the baby poop color guide.
What else is normal on day 13?
- Write down questions for the checkup as they come to you. At 3am they're vivid; by 10am they're gone.
What happens on day 14?
Day 14 is often the 2-week checkup.
Read next: Newborn day 14
When to call your pediatrician
- A rectal temperature of 100.4°F (38°C) or higher in a baby 3 months or younger. The AAP says to call right away, even if your baby seems otherwise well.
- Fewer wet diapers than expected for the day of life (see the table above), or dark yellow urine.
- No meconium (black, sticky poop) in the first 48 hours, or still black or dark green poop on day 5.
- Pink or brick-red staining in the diaper that keeps showing up after the first few days, or blood in the urine.
- Not back to birth weight by about 2 weeks, or your baby seems hungry after nearly every feed.
- Breastfeeding parent: milk hasn't come in by day 5, or breasts stay hard and full after feeds.
- Very sleepy and hard to wake for feeds, floppy, or unusually quiet.
- Yellow skin or eyes that spread or deepen, or any yellow color in the first 24 hours.
- Trouble breathing, blue or gray lips, or your baby is limp or very hard to wake: call 911 (or your local emergency number) now.
If something feels wrong, trust that feeling and call. You never need a reason beyond worry.
Questions parents ask
How much should a 13-day-old eat?
Breastfed babies nurse about 8 to 12 times in 24 hours. Formula-fed babies usually take about 2–3 oz (60–90 ml) per feed, for a daily total of roughly 16–26 oz (480–780 ml).
What should I ask at the 2-week checkup?
Bring your feed and diaper log, and ask about weight compared with birth weight, how often and how much your baby feeds, poop color and count, jaundice, and vitamin D for breastfed babies. No question is too small.
How many wet diapers should a 13-day-old have?
Expect 6 or more wet diapers in 24 hours on day 13, plus 3–4 or more poops that are yellow. Fewer wet diapers than that, or dark urine, is a reason to call your pediatrician.
Related guides
- How many wet diapers should a newborn have?Newborn wet and dirty diapers by day, from day 1 to week 2: how many to expect, poop color changes, and when fewer diapers mean it's time to call.
- Baby poop color guide: what's normal and what's notA baby poop color chart: meconium, transitional green, mustard yellow, formula tan, plus the colors (red, black, white) that mean call your pediatrician.
- How to tell if your baby is getting enough breast milkSigns a breastfed baby is getting enough: wet and dirty diapers by day, weight gain, swallowing and contentment after feeds, plus the warning signs to act on.
- How much should a 2-week-old eat?How much a 2-week-old eats: 2–3 oz (60–90 ml) per feed, 8–10 times a day. Daily totals, a sample schedule, hunger cues and when to call the doctor.
- How to track baby feeding and diapersWhy pediatricians ask about feeds and diapers, exactly what to log for breast, bottle and combo feeding, and paper vs notes app vs tracking app compared.
Free tools
Sources
Last reviewed November 2026. Numbers are ranges from these public health sources; 1 oz ≈ 30 ml.
- AAP · HealthyChildren.org: Amount and Schedule of Formula Feedings
- CDC: How Much and How Often to Breastfeed
- CDC: How Much and How Often to Feed Infant Formula
- NHS: Breastfeeding: milk supply
- AAP · HealthyChildren.org: How to Tell if Your Breastfed Baby is Getting Enough Milk
- AAP · HealthyChildren.org: Fever and Your Baby
Feedoo Baby shares general information, not medical advice. Every baby is different. If you're worried about feeding, weight gain, diapers or your baby's health, call your pediatrician, midwife or health visitor.