A method of contraception without diaphragm; a two-year investigation.
D003267:Contraception; D003270:Contraceptive Agents; D003964:Diaphragm; D006801:Humans; D008297:Male; D012277:Ricinoleic Acids / Q000494:pharmacology*; D013094:Spermatozoa / Q000187:drug effects*
D003270:Contraceptive Agents; D012277:Ricinoleic Acids; C030521:ricinoleic acid
CONTRACEPTIVES; RICINOLEIC ACID/effects; SPERMATOZOA/effect of drugs on