Letter: C-film as a contraceptive.
D004338:Drug Combinations; D005260:Female; D006801:Humans; D011092:Polyethylene Glycols; D011143:Polyvinyl Chloride; D011145:Polyvinyls; D011247:Pregnancy; D013089:Spermatocidal Agents; D013501:Surface-Active Agents
D004338:Drug Combinations; D011145:Polyvinyls; D013089:Spermatocidal Agents; D013501:Surface-Active Agents; D011092:Polyethylene Glycols; D011143:Polyvinyl Chloride