权威例句
Vitamin B12 and anencephaly.Management of twin pregnancies discordant for anencephalyAlpha-fetoprotein in antenatal diagnosis of anencephaly and spina bifidaAlpha-fetoprotein in the antenatal diagnosis of anencephaly and spina bifida.Spina Bifida and Anencephaly Before and After Folic Acid Mandate — United States, 1995–1996 and 1999–2000Decline in the prevalence of spina bifida and anencephaly by race/ethnicity: 1995-2002Prevalence of spina bifida and anencephaly during the transition to mandatory folic acid fortification in the United StatesTrends in the postfortification prevalence of spina bifida and anencephaly in the United StatesMaternal serum-alpha-fetoprotein measurement in antenatal screening for anencephaly and spina bifida in early pregnancy. Report of U...Termination rates after prenatal diagnosis of Down syndrome, spina bifida, anencephaly, and Turner and Klinefelter syndromes: a syst...