Waiting Period after Divorce
As for women who no longer menstruate, if you are uncertain, their waiting period is three months, and the same applies to those who have not yet menstruated. For pregnant women, their term ends with delivery. Whoever is mindful of Allah, He will ease their affairs.
65:4And for such of your women as despair of menstruation, if ye doubt, their period (of waiting) shall be three months, along with those who have it not. And for those with child, their period shall be till they bring forth their burden. And whosoever keepeth his duty to Allah, He maketh his course easy for him.