Estradiol stearate
Estradiol stearate (brand name Depofollan), or estradiol octadecanoate, is a naturally occurring steroidal estrogen and an estrogen ester – specifically, the C17β stearate ester of estradiol. It occurs in the body as a very long-lasting metabolite and prohormone of estradiol. In addition, estradiol stearate is or has been available as a pharmaceutical drug for use via depot intramuscular injection. The drug was introduced in 1941 as Depofollan and was the first long-acting estrogen, although it has never been widely used. It has been reported in at least one source to have a duration of at least one month.
Levonorgestrel
Levonorgestrel is marketed alone or in combination with an estrogen (specifically ethinylestradiol, estradiol, or estradiol valerate) under a multitude of brand names throughout the world, including "Alesse", Altavera, Alysena, Amethia, Amethyst, Ashlyna, Aviane, Camrese, Chateal, "Climara Pro", Daysee, Emerres, Enpresse, Erlibelle, "Escapelle", Falmina, Introvale, Isteranda, "Jadelle", "Jaydess", Jolessa, "Klimonorm", Kurvelo, Kyleena, Lessina, "Levlen", Levodonna, "Levonelle", Levonest, Levosert, Levora, Liletta, "Loette", "Logynon", "LoSeasonique", Lutera, Lybrel, Marlissa, "Microgynon", "Microlut", Min-Ovral, "Miranova", "Mirena", My Way, Myzilra, Next Choice, "Nordette", Norgeston, NorLevo, "Norplant", Option 2, Orsythia, Ovima, Ovranette, "Plan B", "Plan B One-Step", Portia, "Postinor", "Postinor-2", Preventeza, Ramonna, "Rigevidon", Quartette, Quasense, "Seasonale", "Seasonique", "Skyla", Sronyx, Tri-Levlen, "Trinordiol", Triphasil, "Triquilar", "Tri-Regol", Trivora, and Upostelle, among many others. These formulations are used as emergency contraceptives, normal contraceptives, or in menopausal hormone therapy for the treatment of menopausal symptoms.