Catalán Félez, R <br/><br/>
[Pregnancy due to the failure of a hormonal contraceptive method].  [electronic resource] 

 -  Atencion primaria  Mar 1993 
 - 203 p.  digital 
<br/><br/> Publication Type: Case Reports; Letter 
<br/><br/><label>ISSN: </label>0212-6567 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Adult<br/>Contraceptives, Oral, Hormonal<br/>Female<br/>Humans<br/>Pregnancy<br/>Risk Factors