Nuttal, I D <br/><br/>
Progestagen-releasing vaginal rings--an update.  [electronic resource] 

 -  IPPF medical bulletin  Apr 1985 
 - 1-2 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0019-0357 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology<br/>Contraception<br/>Contraceptive Agents<br/>Contraceptive Agents, Female<br/>Contraceptive Devices, Female<br/>Economics<br/>Endocrine System<br/>Family Planning Services<br/>Hormones<br/>Levonorgestrel<br/>Physiology<br/>Reproductive Control Agents<br/>Research<br/>Technology