Estimations of gestational age and screening for Down's syndrome.
Reynolds
T M
TM
Penney
M D
MD
D002508:Cephalometry; D004314:Down Syndrome / Q000175:diagnosis*; D005315:Fetal Diseases / Q000175:diagnosis*; D005865:Gestational Age; D006801:Humans; D010294:Parietal Bone / Q000033:anatomy & histology; D011296:Prenatal Diagnosis; D012307:Risk Factors