Elaborate on the anatomical and physiological adaptations of the reproductive system in response to hormonal contraception, including oral contraceptives, injectables, and intrauterine devices (IUDs). Discuss the mechanisms of action involving suppression of gonadotropin secretion, inhibition of ovulation, and alteration of cervical mucus viscosity, and elucidate the implications for menstrual cycle regulation and fertility control. Furthermore, explore the safety profile, side effects, and non-contraceptive benefits of hormonal contraception, and evaluate individualized approaches for contraceptive selection based on patient preferences and medical history.