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9. Placental mosaicism is associated with unexplained second-trimester elevation of MShCG levels, but not with elevation of MSAFP levels. Morssink LP, Sikkema-Raddatz B, Beekhuis JR, De Wolf BT, Mantingh A. Prenat Diagn; 1996 Sep; 16(9):845-51. PubMed ID: 8905899 [Abstract] [Full Text] [Related]
10. Trisomy 18 and maternal serum and amniotic fluid alpha-fetoprotein. Lindenbaum RH, Ryynänen M, Holmes-Siedle M, Puhakainen E, Jonasson J, Keenan J. Prenat Diagn; 1987 Sep; 7(7):511-9. PubMed ID: 2444965 [Abstract] [Full Text] [Related]