Neural tube opening defects (NTOD) and central nervous system (CNS) Diagnosis at the ultrasound morphology clinic of the department of gynecology and obstetrics, faculty of medicine of Ribeirão Preto, University of São Paulo - Machado, J. C.; Cassoli, R.; Costa, F. S.; Dib, Flávio R.; Cunha, Sérgio Pereira da; Berezowski, Aderson Tadeu (World Congress of Ginecological Endocrinology, 2000)