There are several forms of hormonal contraception available today, birth control pills, hormonal skin patches, implants, coils. They all affect hormone levels and prevent pregnancy, but they are used in different ways. How does one decide which form works best for their needs? Jennifer Shark a Certified Nurse Midwife at MIT Health with many years of contraceptive counseling experience, is here to discuss hormonal birth control options, how they work, their effectiveness, and things to consider when choosing birth control.