Placenta · 2000 · 51 citations · 24 references
MedicineMaternal HealthObstetricsHigh-risk PregnancyReproductive EndocrinologyReproductive MedicineEclampsiaHypertensive DisordersPregnancyPregnancy DiagnosisPregnancy EndocrinologyPregnancy PhysiologyPreeclampsia Risk PredictionPreeclampsia Risk ScreeningSerum Human Chorionic Gonadotropin Correlation
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Maternal serum screening for Down's syndrome in early pregnancy.
N J Wald, Howard Cuckle, J. W. Densem et al. · BMJ · 1988 · 974 citations · Full text
Trophoblastic invasion of human decidua from 8 to 18 weeks of pregnancy
Robert Pijnenborg, Glenys Dixon, W.B. Robertson et al. · Placenta · 1980 · 855 citations
Medicine, Biology, Obstetrics +10