Cordocentesis is done in which period of pregnancy?: (A) 11-14 weeks, (B) 18-20 weeks, (C) 26-28 weeks, (D) 28-32 weeks
Answer is B. Cordocentesis or percutaneous umbilical blood sampling (PUBS)- Done after 18 weeks Invasive procedure Gives results in 24-48 hrs punctured near the inseion at the placental end Uses - Fetal anemia assessment remains the most common indication. Assessment and treatment of platelet allo-immunization and for fetal karyotype determination