title: Effect of low-dose progestogen-estrogen combination (WL-20) on the menstrual cycle of sexually active women of childbearing age.
mesh_terms: D001835:Body Weight / Q000187:drug effects; D004338:Drug Combinations; D004341:Drug Evaluation; D004997:Ethinyl Estradiol / Q000009:adverse effects / Q000494:pharmacology*; D005260:Female; D006261:Headache / Q000139:chemically induced; D006801:Humans; D008598:Menstruation / Q000187:drug effects*; D008599:Menstruation Disturbances; D009644:Norgestrel / Q000009:adverse effects / Q000494:pharmacology*; D013997:Time Factors; D014717:Vertigo / Q000139:chemically induced
chemical_list: D004338:Drug Combinations; D009644:Norgestrel; D004997:Ethinyl Estradiol