Progestogen-only injectable contraceptive
Progestogen-only injectable contraceptives are a form of hormonal contraception and progestogen-only contraception that are administered by injection and providing long-lasting birth control. As opposed to combined injectable contraceptives, they contain only a progestogen without an estrogen, and include two progestin preparations:
Progestogens that have been studied for potential use as POICs but were never marketed as such include the progesterone derivatives algestone acetophenide , chlormadinone acetate, hydroxyprogesterone caproate, gestonorone caproate, and oxogestone phenpropionate, and the testosterone derivatives lynestrenol phenylpropionate, levonorgestrel butanoate, levonorgestrel cyclobutylcarboxylate, and levonorgestrel cyclopropylcarboxylate. Some of these have been introduced for use in combined injectable contraceptives instead.
