Best time to do quadruple test: (A) 8-12 weeks, (B) 11-15 weeks, (C) 15-20 weeks, (D) 18-22 weeks
Answer is C. * The quad screen is done in the second trimester, usually between 15 and 20 weeks of pregnancy. * Ideally, the test should be performed in conjunction with first-trimester screening tests. REF : DUTTA BOOK OF OBSTETRICS