The state of hormonal contraception today: benefits and risks of hormonal contraceptives: combined estrogen and progestin contraceptives
American Journal of Obstetrics and Gynecology 205(4 Suppl): S9-13
Discussion of effective birth control methods can be a challenging process for clinicians because the adoption and consistent use of contraception may be influenced by patients' fears, myths, and misperceptions. Over the years, new progestins have been included in combination contraceptives or are used alone to provide effective contraception as well as to decrease androgenic side effects and ameliorate the symptoms of premenstrual dysphoric disorder. Alternative delivery systems and regimens have also been introduced to improve tolerability and continuance and convenience of use. This is a review of estrogen and progestin combinations and their effects.