To avoid another pregnancy, even shortly after giving birth (and even if breastfeeding), you must use birth control every time you are having heterosexual intercourse. There are several contraceptive options that are safe to use while breastfeeding including the progestin-only birth control pills, barrier methods such as condoms (diaphragms need to be refitted after having a baby), and male or female sterilization (vasectomy and tubal ligation), among others. Speak with your healthcare provider about postpartum contraception, and check out these resources below for detailed information about your options.