In addition to blocking ovulation, pills also make cervical mucous more likely to block sperm. Lighter periods with less cramping. Less blood loss means less risk for anemia. Reduces risk for ovarian and uterine cancer and decreases risk for pelvic inflammatory disease. Associated with spotting between periods, missed periods, increase in blood pressure, and a variety of other side effects.
Most side effects are uncommon and can be managed by changing pills.
This method does not protect against STDs. In the office, a health care professional surgically inserts six toothpick-size flexible capsules in a fanlike pattern just beneath the skin of a woman's upper inner arm. The system can remain in place for five years and is highly effective. Annual Pap smears are still required. Initial cost is higher than for other types of birth control but equals out if continued for the five years.