title: Excess males in preterm birth: interactions with gestational age, race, and multiple birth.
authors.forename: W H
authors.initials: WH
authors.lastname: James
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D011247:Pregnancy; D011272:Pregnancy, Multiple; D044469:Racial Groups; D012744:Sex Ratio