title: Sonographic diagnosis of caudal regression in the first trimester of pregnancy.
mesh_terms: D000015:Abnormalities, Multiple / Q000000981:diagnostic imaging*; D000328:Adult; D005260:Female; D006801:Humans; D038061:Lower Extremity Deformities, Congenital / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011256:Pregnancy Outcome; D011261:Pregnancy Trimester, First; D013131:Spine / Q000002:abnormalities* / Q000000981:diagnostic imaging; D013577:Syndrome; D016216:Ultrasonography, Prenatal