title: Transvaginal sonography for fetal measurement in early pregnancy.
authors.forename: M S
authors.initials: MS
authors.lastname: Mills
mesh_terms: D005314:Embryonic and Fetal Development; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D016216:Ultrasonography, Prenatal / Q000379:methods*; D014621:Vagina