Shojania, A M <br/><br/>
Effect of oral contraceptives on vitamin-B12 metabolism.  [electronic resource] 

 -  Lancet (London, England)  Oct 1971 
 - 932 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0140-6736 
<br/><br/><label>Standard No.: </label>10.1016/s0140-6736(71)92552-9  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Contraceptives, Oral--adverse effects<br/>Female<br/>Folic Acid--blood<br/>Humans<br/>Pregnancy<br/>Vitamin B 12--blood