The antifertility effectiveness of low doses of ethinyl oestradiol.
D000328:Adult; D000367:Age Factors; D003276:Contraceptives, Oral / Q000008:administration & dosage; D004997:Ethinyl Estradiol / Q000008:administration & dosage*; D005260:Female; D005298:Fertility / Q000187:drug effects*; D006801:Humans; D008598:Menstruation / Q000187:drug effects; D008875:Middle Aged; D010060:Ovulation / Q000187:drug effects
D003276:Contraceptives, Oral; D004997:Ethinyl Estradiol