The association between fetal sex and preterm birth in twin pregnancies.
Usta
Ihab M
IM
Nassar
Anwar H
AH
D005260:Female; D005333:Fetus; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D007752:Obstetric Labor, Premature; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012737:Sex Factors; D014427:Twins