09/14/2026
🤱 The first week of breastfeeding: your milk changes, and so does baby’s p**p!
The first week can feel like a whirlwind. You’re learning your baby, your baby is learning you, and your breastmilk is changing day by day to meet exactly what they need.
Here’s a little peek at what you may notice:
Days 1–2: Colostrum 💛
Your breasts produce colostrum — thick, concentrated, nutrient-rich milk that’s perfectly designed for those tiny first days. Baby only needs small amounts at each feeding.
Baby’s first p**ps are meconium: thick, sticky, and very dark green/black.
Days 2–4: Transitional milk 🌿
Your milk gradually becomes lighter, creamier, and more plentiful. This is often when parents notice their breasts feeling fuller or heavier.
As baby gets more milk, those dark p**ps begin changing, too — from meconium → dark green → lighter green/brown.
Around days 3–5: Milk “comes in” 🥛
For many parents, mature milk noticeably increases around 3–5 days after birth. It can happen earlier or take a little longer, especially after a first birth.
You may suddenly feel very full, warm, or even engorged. Baby’s p**ps usually continue changing until they become yellow, loose, and seedy — that classic breastfed-baby p**p! 💩💛
By the end of the first week, feeding and diaper patterns can look very different from those first couple of days.
And remember: diapers are one of the ways we can tell how feeding is going. If you’re concerned about baby’s intake, diaper output, jaundice, or weight, reach out to your pediatrician or an IBCLC.
The first week is a lot. This is one of the best times to have extra support 🤍
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