Gynaecology & Obstetrics Minimum level of Beta Hcg detected by radioimmunoassay is : A 1.5-3.5 IU/ml B 0.5-1 IU/ml C 0.02-0.05 IU/ml D 0.001 IU/ml 💡 Explanation Minimum level of Beta Hcg detected by radioimmunoassay is : ✓ Correct Answer: D. 0.001 IU/ml