Effectiveness of the Majzlin spring intrauterine contraceptive device.
D004509:Education, Nursing, Continuing; D005193:Family Planning Services; D005260:Female; D006801:Humans; D007434:Intrauterine Devices; D008880:Midwifery / Q000193:education; D009518:New York; D011247:Pregnancy; D011369:Professional-Patient Relations