Usually, milk is produced 1-2 days after delivery. However, if the mother is in poor health, milk production usually occurs about 3-4 days after delivery, and at the latest, not more than 7 days. However, the exact time of milk production depends on the mother’s condition and whether she has any complications during pregnancy, so it is not possible to generalize. Due to the change of hormone level in the mother’s body and the baby’s stimulation of the nipple, milk is usually produced 1-2 days after delivery. However, if there are factors such as postpartum hemorrhage, gestational hypertension or poor postpartum feeding, the milk production time after delivery will be relatively late, which may be around 1 week. In addition, if the mother is in a bad mood after delivery, such as too much anxiety or depression, it will also delay the milk production time after delivery. It is recommended to let the baby suck on the nipple within half an hour after delivery and to ensure that the number of sucking is not less than 8 times in 24 hours to promote milk secretion. At the same time, the mother should keep her mood happy and eat more food containing high quality protein to supplement nutrition, which is conducive to breastfeeding as soon as possible.