Boomsma, D I <br/><br/>
Protease inhibitor (Pi) locus, fertility and twinning.  [electronic resource] 

 -  Human genetics  May 1992 
 - 329-32 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0340-6717 
<br/><br/><label>Standard No.: </label>10.1007/BF00220552  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Alleles<br/>Family Characteristics<br/>Female<br/>Fertility--genetics<br/>Gene Frequency--genetics<br/>Humans<br/>Male<br/>Middle Aged<br/>Phenotype<br/>Polymorphism, Genetic--genetics<br/>Pregnancy<br/>Pregnancy, Multiple--genetics<br/>Twins--genetics<br/>Twins, Dizygotic--genetics<br/>Twins, Monozygotic--genetics<br/>alpha 1-Antitrypsin--genetics