Jackson, R <br/><br/>
Present status of contraceptive vaginal rings.  [electronic resource] 

 -  Advances in contraception : the official journal of the Society for the Advancement of Contraception  Sep 1990 
 - 169-76 p.  digital 
<br/><br/> Publication Type: Journal Article; Review 
<br/><br/><label>ISSN: </label>0267-4874 
<br/><br/><label>Standard No.: </label>10.1007/BF01849491  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Contraceptive Agents, Female--administration & dosage<br/>Drug Implants<br/>Estrogens--administration & dosage<br/>Female<br/>Humans<br/>Progesterone--administration & dosage<br/>Uterine Hemorrhage--chemically induced