title: Male-female twins in utero.
authors.forename: N L
authors.initials: NL
authors.lastname: Segal
mesh_terms: D005260:Female; D006801:Humans; D017084:Otoacoustic Emissions, Spontaneous; D011247:Pregnancy; D011297:Prenatal Exposure Delayed Effects; D012737:Sex Factors; D014427:Twins; D014599:Uterus / Q000502:physiology*