Nexplanon and Norplant are classified as what type of contraceptive?

Nexplanon and Norplant are classified as progesterone-only contraceptives, also known as progestin-only contraceptives. These methods release a synthetic form of the hormone progesterone into the body, which works primarily by thickening cervical mucus to prevent sperm from reaching an egg, inhibiting ovulation, and altering the uterine lining to reduce the likelihood of implantation if fertilization does occur.

This classification distinguishes them from combined oral contraceptives, which contain both estrogen and progesterone. Barrier methods rely on physical barriers to prevent sperm from entering the uterus, and emergency contraceptives are used after unprotected intercourse to prevent pregnancy. The specific mechanism and hormonal composition of Nexplanon and Norplant align them with the progesterone-only category.