title: [A preliminary study on the mechanism of reducing menstrual blood loss after insertion of key-shaped IUD containing progesterone].
mesh_terms: D001208:Asia; D001695:Biology; D001769:Blood; D002681:China; D003267:Contraception; D003625:Data Collection; D003906:Developing Countries; D004194:Disease; D005193:Family Planning Services; D005202:Asia, Eastern; D006470:Hemorrhage; D007434:Intrauterine Devices; D007436:Intrauterine Devices, Medicated; D008137:Longitudinal Studies; D008598:Menstruation; D010827:Physiology; D012098:Reproduction; D012106:Research; D012816:Signs and Symptoms
keywords: Asia; Biology; Bleeding--changes; China; Contraception; Contraceptive Methods; Data Collection; Developing Countries; Diseases; Eastern Asia; Family Planning; Hemic System--changes; Iud; Iud, Hormone Releasing; Longitudinal Studies; Menstruation; Physiology; Reproduction; Research Methodology; Signs And Symptoms; Studies