Lactational amenorrhea method (LAM) is a family planning method (or a natural birth control technique) based on breastfeeding. It can be effective up to six months after childbirth, provided the woman is fully or nearly fully breastfeeding and monthly bleeding has not returned. It has long been observed that breastfeeding delays the return of menstruation in new moms. The lactational amenorrhea method (LAM) is a natural birth control technique based on the fact that lactation (breastmilk production) causes amenorrhea (lack of menstruation).
Producing milk is called lactating and not having a period is called amenorrhea, hence this method of birth control is called lactational amenorrhea (or LAM).

How does LAM works?

Studies have confirmed that women who exclusively breastfeed their baby around-the-clock and who have not started menstruating are very unlikely to get pregnant during the first six months after they give birth.
Here's why it works: Breastfeeding interferes with the release of the hormones needed to trigger ovulation. So the more you nurse your baby, the less likely you are to ovulate. If a woman exclusively breastfeeds her baby for six months, the hormones that produce the breast milk will also work to stop the ovaries from releasing an egg (that is, there will be no ovulation) for the first six months after the baby is born. A woman doesn't get her period during this time.

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