Masson, S <br/><br/>
A clinical comparison of two triphasic oral contraceptives with levonorgestrel or norethindrone: a prospective, randomized, single-blind study.  [electronic resource] 

 -  Contraception  Jan 1993 
 - 43-54 p.  digital 
<br/><br/> Publication Type: Clinical Trial; Comparative Study; Journal Article; Randomized Controlled Trial; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>0010-7824 
<br/><br/><label>Standard No.: </label>10.1016/0010-7824(93)90108-j  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adolescent<br/>Adult<br/>Contraceptives, Oral, Combined--pharmacology<br/>Contraceptives, Oral, Sequential--pharmacology<br/>Drug Combinations<br/>Ethinyl Estradiol--pharmacology<br/>Ethinyl Estradiol-Norgestrel Combination<br/>Female<br/>Humans<br/>Menstruation--drug effects<br/>Norethindrone--pharmacology<br/>Norgestrel--pharmacology<br/>Prospective Studies<br/>Single-Blind Method