title: Staying the course.
authors.affiliation: Center for Fetal Medicine and Women's Ultrasound, 6310 San Vincente, #520, Los Angeles, CA 90048, USA. LPlatt8496@aol.com
authors.forename: L D
authors.initials: LD
authors.lastname: Platt
mesh_terms: D000782:Aneuploidy; D005260:Female; D006801:Humans; D009295:Nasal Bone / Q000002:abnormalities* / Q000000981:diagnostic imaging; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D012680:Sensitivity and Specificity; D014314:Trisomy; D016216:Ultrasonography, Prenatal