title: Ultrasonography in labor.
authors.affiliation: Department of Gynecology and Obstetrics, Loma Linda University Medical Center, CA 92350.
authors.forename: H F
authors.initials: HF
authors.lastname: Andersen
mesh_terms: D005260:Female; D006801:Humans; D007744:Obstetric Labor Complications / Q000000981:diagnostic imaging*; D011247:Pregnancy; D016216:Ultrasonography, Prenatal