New England Journal of Medicine · 1996 · 182 citations · 41 references
In the second trimester of pregnancy, measuring inhibin A in maternal serum, in combination with measurements of alpha-fetoprotein and beta subunit of human chorionic gonadotropin, significantly improved the rate of detection of Down's syndrome.
41
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