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A prospective evaluation of a second-trimester screening test for fetal Down syndrome using maternal serum alpha-fetoprotein, hCG, and unconjugated estriol.
Obstet Gynecol. 1993 Jan;81(1):72-7.
Obstet Gynecol. 1993.
PMID: 7677967
An association between elevated levels of human chorionic gonadotropin in the midtrimester and adverse pregnancy outcome.
Lieppman RE, Williams MA, Cheng EY, Resta R, Zingheim R, Hickok DE, Luthy DA.
Lieppman RE, et al.
Am J Obstet Gynecol. 1993 Jun;168(6 Pt 1):1852-6; discussion 1856-7. doi: 10.1016/0002-9378(93)90701-j.
Am J Obstet Gynecol. 1993.
PMID: 8317532
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