Many novice mothers will breastfeed their children for a period of time after giving birth. During the feeding period, the child received sufficient nutrition. However, many mothers do not conceive during breastfeeding. So why doesn't breastfeeding make you pregnant?

Many times, abnormal ovarian ovulation makes it difficult for women to conceive during postpartum lactation. After stopping breastfeeding, prolactin levels gradually decrease to normal. The secretion of pituitary gonadotropins gradually recovers. Ovarian ovulation, menstruation, and conception have also returned to normal.
Because the estrogen, progesterone, and prolactin in the mother's body are factors that control and regulate the development and secretion of the female breast. These three hormones significantly increase during pregnancy, but due to estrogen and progesterone inhibiting the lactation effect of prolactin, there is no true lactation except for a small amount of colostrum before delivery.
As soon as the mother gives birth to the baby, the inhibition of estrogen is reduced and progesterone levels rapidly decrease, lactation begins to occur, and infant sucking promotes and maintains lactation. During pregnancy and postpartum lactation, prolactin levels increase and gonadotropin secretion is inhibited. At this time, the ovaries also have adverse effects on gonadotropins. Therefore, some postpartum mothers may experience anovulatory menstruation and a prolonged period of amenorrhea. So some mothers also breastfeed their children to prevent secondary pregnancy.