Gynaecology & Obstetrics A woman develops chickenpox at a period of gestation of 8 weeks.What is the best method to exclude foetal varicella syndrome? A Perform amniocentesis at 15 weeks and test for VZV DNA in the amniotic fluid B Perform an ultrasound scan at 20 weeks C Perform an ultrasound scan immediately D Perform chorionic villous sampling and test for VZV DNA 💡 Explanation A woman develops chickenpox at a period of gestation of 8 weeks.What is the best method to exclude foetal varicella syndrome? ✓ Correct Answer: B. Perform an ultrasound scan at 20 weeks