Obstetrical & Gynecological Survey · 1982 · 77 citations · 0 references
MedicineMaternal HealthObstetricsMaternal-fetal MedicinePerinatal EpidemiologyPrenatal DiagnosisAmniotic Fluid AssessmentAntenatal AssessmentPregnancyPregnancy DiagnosisPrenatal AssessmentSpina BifidaEarly Pregnancy Anomaly Detection
C. R. F. Cancer Epidemiology and Clinical Trials Unit. University of Oxford. Radcliffe Infirmary. Oxford. England