SEX ratio at birth.  [electronic resource] 

 -  British medical journal  Jul 1953 
 - 142-3 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0007-1447 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Female<br/>Humans<br/>Parturition<br/>Sex Characteristics<br/>Sex Ratio