Bernstein, M E <br/><br/>
Variation of primary and secondary mammalian sex ratio.  [electronic resource] 

 -  Human biology  Jun 1990 
 - 437-43 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>0018-7143 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Abortion, Spontaneous--epidemiology<br/>Animals<br/>Female<br/>Humans<br/>Insemination, Artificial<br/>Male<br/>Pregnancy<br/>Sex Ratio<br/>Spermatozoa--analysis