Milk usually comes in about 2–5 days after giving birth. Before that, the breasts produce colostrum, which contains everything a newborn needs during its first days of life.
What does it mean for milk to "come in"?
After childbirth, a hormonal change occurs in the body that causes breast milk production to increase. This is what is commonly referred to as the milk "coming in".
Many notice that their breasts become:
- Larger
- Heavier
- Firmer
- Warmer
When the milk comes in, it can sometimes feel as if the breasts suddenly fill up.
When does milk come in after childbirth?
For most people, this happens between day 2 and day 5 after giving birth.
However, it is completely normal for it to take a little less or more time.
Some notice a clear change overnight, while for others the transition occurs more gradually.
What does the baby eat before the milk comes in?
During the first few days, the breasts produce colostrum.
Colostrum:
- Is produced in small quantities
- Is rich in nutrients
- Contains antibodies
- Is adapted to the newborn baby's small stomach
Even if the amount may seem small, it is usually enough for most newborns during the first few days.
Can it take longer for the milk to come in?
Yes. For some, it can take longer than five days.
The milk can sometimes come in later after:
- Cesarean section
- Complicated delivery
- Premature birth
- Significant blood loss during childbirth
If you feel worried about breastfeeding, you can contact your maternity ward, midwife, or breastfeeding clinic for support and advice.
How do you know that the milk has come in?
Common signs are:
- Breasts feel fuller
- Breasts feel heavier
- You notice more milk coming out during breastfeeding or pumping
- The baby is heard swallowing more often during breastfeeding
Many also experience their breasts feeling tight when the milk comes in.
What happens if the milk has not come in after a few days?
Every body is different, and it is normal for this to vary.
If you are worried that your milk has not come in, or if you are unsure if your baby is getting enough food, you should contact your maternity ward, pediatric clinic, or a breastfeeding clinic for support.
Frequently asked questions
Can you breastfeed before the milk has come in?
Yes. The colostrum produced during the first few days is adapted to the newborn baby's needs.
Does milk come in faster if you breastfeed often?
Many find that frequent breastfeeding helps the body stimulate milk production. The baby's sucking signals to the body to produce more milk.
Is it normal for the breasts to become hard when the milk comes in?
Yes. Many feel their breasts become tight, hard, or tender when milk production increases.
Can the milk come in after a cesarean section?
Yes. Milk usually comes in after a cesarean section as well, but it can take slightly longer for some.