Gynaecology & Obstetrics Biochemical analytes of combined test of first-trimester screening is A AFP and b-hcg B b-hcg and PAPP-A C AFP and PAPP-A D Inhibin and PAPP-A 💡 Explanation Biochemical analytes of combined test of first-trimester screening is ✓ Correct Answer: B. b-hcg and PAPP-A