title: CONTROLLED RHYTHM: A PRELIMINARY REPORT.
mesh_terms: D003267:Contraception; D005260:Female; D006801:Humans; D008598:Menstruation; D008656:Mestranol; D009640:Norethindrone; D010060:Ovulation
chemical_list: D008656:Mestranol; D009640:Norethindrone
keywords: CONTRACEPTION; MENSTRUATION; MESTRANOL; NORETHINDRONE; OVULATION