Final answer:
Nexplanon, a birth control drug, is usually implanted under the skin of a woman's upper arm. It releases a progestin hormone to prevent pregnancy.
Step-by-step explanation:
The birth control drug Nexplanon is usually implanted under the skin of a woman's upper arm. Nexplanon is a matchstick-size, flexible rod that releases a progestin hormone. It works by causing changes in the cervical mucus and the lining of the uterus, which prevent sperm from reaching an egg and also prevent the ovaries from releasing eggs.