Lactational amenorrhea is a kind of periodic abstinence in which chances of fertilization is prevented upto a maximum period after parturition is
Six months
Amenorrhea essentially means lack of menstrual cycles. This is based on the principle that women are not fertile, that is they do not ovulate or have menstrual cycles for six months after childbirth or parturition. This makes lactational amenorrhea a natural method of contraception.