The probability of side effects with ovral, norinyl 1/50 and norlestrin.

Abstract	This report provides specific information on the prevalence rates of the most common side effects during the first 3 cycles of use of 3 combination oral contraceptives (OCs) containing 50 mcg estrogen. The probabilities of a symptom occurring for the first time, or persisting once present, during the initial cycles of OC use are given for each of the 3 combined OCs.
Authors	G S Berger, D A Edelman, P P Talwar
Journal	Contraception (Contraception) Vol. 20 Issue 5 Pg. 447-53 (Nov 1979) ISSN: 0010-7824 [Print] United States
PMID	160860 (Publication Type: Clinical Trial, Journal Article, Randomized Controlled Trial)
Chemical References	Contraceptives, Oral Contraceptives, Oral, Combined Norgestrel Ethinyl Estradiol Mestranol Norethindrone
Topics	Acne Vulgaris (chemically induced) Contraceptives, Oral Contraceptives, Oral, Combined Ethinyl Estradiol (adverse effects) Female Humans Menstruation Mestranol (adverse effects) Norethindrone (adverse effects) Norgestrel (adverse effects) Probability Time Factors Uterine Hemorrhage (chemically induced)

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