Analyzing contraceptive failure.
Kippley
J F
JF
D003273:Contraceptive Devices; D003625:Data Collection / Q000592:standards; D004868:Equipment Failure / Q000706:statistics & numerical data*; D005260:Female; D006801:Humans; D008432:Mathematical Computing; D010349:Patient Compliance; D010353:Patient Education as Topic; D011247:Pregnancy; D015203:Reproducibility of Results