[The effects of four types of IUD in China on menstrual blood volume].
Gao
J
J
D001695:Biology; D001769:Blood; D003267:Contraception; D004194:Disease; D004467:Economics; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D006454:Hemoglobins; D015994:Incidence; D007434:Intrauterine Devices; D007435:Intrauterine Devices, Copper; D008595:Menorrhagia; D008599:Menstruation Disturbances; D010827:Physiology; D012106:Research; D012107:Research Design; D013672:Technology
D006454:Hemoglobins
Biology; Clinical Research; Contraception; Contraceptive Methods--complications; Diseases; Economic Factors; Evaluation; Family Planning; Hemic System; Hemoglobin Level; Incidence; Iud, Copper Releasing--complications; Iud--complications; Measurement; Menorrhagia; Menstruation Disorders; Physiology; Research And Development; Research Methodology; Technology