The best period of gestation to carry out chorion villous biopsy for prenatal diagnosis is?: (A) 8-10 weeks, (B) 10-12 weeks, (C) 12-14 weeks, (D) 14-16 weeks
Answer is B. Chorionic villus sampling (CVS) is carried out transcervical between 10-12 weeks and trans-abdominal from 10 weeks to term. Ref:Textbook of Gynecology By D C Dutta, 5th Edition, Page 315