title: Long-acting steroids provide new options.
mesh_terms: D001695:Biology; D003267:Contraception; D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D004703:Endocrine System; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D006728:Hormones; D007267:Injections; D016912:Levonorgestrel; D017258:Medroxyprogesterone Acetate; D010827:Physiology; D011374:Progesterone; D011372:Progestins
chemical_list: D003270:Contraceptive Agents; D003271:Contraceptive Agents, Female; D006728:Hormones; D011372:Progestins; D011374:Progesterone; D016912:Levonorgestrel; D017258:Medroxyprogesterone Acetate
keywords: Biodegradable Delivery Systems; Biology; Contraception; Contraceptive Agents; Contraceptive Agents, Female; Contraceptive Agents, Progestin; Contraceptive Effectiveness; Contraceptive Implants; Contraceptive Methods; Depo-provera; Endocrine System; Family Planning; Hormones; Injectables; Levonorgestrel; Medroxyprogesterone Acetate; Physiology; Progestational Hormones; Progesterone; Use-effectiveness