Which Congenital malformation of the fetus can be diagnosed in first trimester by ultrasound?: (A) Anencephaly, (B) Iniencephaly, (C) Microcephaly, (D) Holoprosencephaly
Answer is A. Ans. A. AnencephalyUltrasound can be used to detect anencephaly as early as 10 weeks' gestation. With an abnormal head/trunk ratio and abnormally large orbits, the absence of the superior vault is associated.The length of crown-rump is normal in most anencephalic fetuses.