Gynaecology & Obstetrics Which of the following is true regarding chorionicity in multifetal pregnancy A Monochorionic membranes should have four layers B Dichorionic pregnancies are always dizygotic C Monochorionic pregnancies are always dizygotic D Chorionicity is accurately determined by first trimester ultrasound scan 💡 Explanation Which of the following is true regarding chorionicity in multifetal pregnancy ✓ Correct Answer: D. Chorionicity is accurately determined by first trimester ultrasound scan