Hormones involved in breastfeeding are meant to ensure that is occures, that enough milk is produced, and that the mothers are able to tolerate the process. Some mothers are able to find enjoyment in breastfeeding, though many find it irritating, frustrating or unpleasant. Hormones involved in breastfeeding also can trigger the fight or flight mechanism within the mother, allowing them to better protect their child if necessary.

Some of the hormones that are involved are oxytocin and prolactin.