title: Oral conception and uterine size-ultrasonic study.
abstract: The effect of oral contraceptives on uterine size has been examined by B-mode ultrasonography. The subjects were 39 women (mean age 21) with regular menstrual cycles. None of them had taken the pill previously. The combined pill (E-con or Neo-Primovlar) was prescribed for 21 and the progestogen-only pill (Exluton) for 18 of the participants. The uterine size  was measured with the help of B-scanning prior to the pill and after it was taken for three and six months. All three ultrasound examinations were carried out on the same day of the cycle plus or minus one day). No difference can be observed between the three measurements of uterine size either in the women on the combined pills or those on th progestogen-only pill (p greater than 0.05). The study will be continued. So far six women have been examined by ultrasound after having taken oral contraceptives for 12 months. Uterine size has remained unchanged in each case.
mesh_terms: D000293:Adolescent; D000328:Adult; D003276:Contraceptives, Oral / Q000494:pharmacology*; D003280:Contraceptives, Oral, Synthetic / Q000494:pharmacology*; D004338:Drug Combinations; D004997:Ethinyl Estradiol / Q000494:pharmacology; D005260:Female; D006801:Humans; D008234:Lynestrenol / Q000494:pharmacology; D009640:Norethindrone / Q000494:pharmacology; D009644:Norgestrel / Q000494:pharmacology; D014463:Ultrasonography; D014599:Uterus / Q000033:anatomy & histology / Q000187:drug effects*
chemical_list: D003276:Contraceptives, Oral; D003280:Contraceptives, Oral, Synthetic; D004338:Drug Combinations; D009644:Norgestrel; D004997:Ethinyl Estradiol; D008234:Lynestrenol; D009640:Norethindrone