title: Antispermatogenic effect of Norgestrel in rhesus monkeys.
mesh_terms: D000818:Animals; D000882:Haplorhini; D008297:Male; D008540:Meiosis / Q000187:drug effects*; D011372:Progestins / Q000494:pharmacology*; D013094:Spermatozoa / Q000187:drug effects*
chemical_list: D011372:Progestins