How it works

Women who are fully (or nearly fully) breastfeeding can use the lactational method for the first six months as long as:

  • The woman has no periods at all
  • She’s fully or very nearly fully breastfeeding, and the baby is less than six months old.

There are no physical side effects, and you can use it to plan when you get pregnant.

  • The fertility signals used in natural family planning
    methods aren't reliable in women who are breast-feeding.
  • After having a baby, it's possible to get pregnant before your periods start again because you ovulate (release an egg) around two weeks before your period.

This method becomes unreliable:

  • When other foods or liquids are substituted for breast milk, and
  • After the baby is six months old.