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13. Maternal serum-alpha-fetoprotein measurement in antenatal screening for anencephaly and spina bifida in early pregnancy. Report of U.K. collaborative study on alpha-fetoprotein in relation to neural-tube defects. Wald NJ, Cuckle H, Brock JH, Peto R, Polani PE, Woodford FP. Lancet; 1977 Jun 25; 1(8026):1323-32. PubMed ID: 69055 [Abstract] [Full Text] [Related]
15. Stage II ultrasound examination for the diagnosis of fetal abnormalities with an elevated amniotic fluid alpha-fetoprotein concentration. Hobbins JC, Venus I, Tortora M, Mayden K, Mahoney MJ. Am J Obstet Gynecol; 1982 Apr 15; 142(8):1026-9. PubMed ID: 6176125 [Abstract] [Full Text] [Related]
19. The relationship between maternal serum and amniotic fluid alpha-fetoprotein in women undergoing early amniocentesis. Brumfield CG, Cloud GA, Davis RO, Finley SC, Hauth JC, Boots L. Am J Obstet Gynecol; 1990 Sep 15; 163(3):903-6. PubMed ID: 1698336 [Abstract] [Full Text] [Related]