Gynaecology & Obstetrics At what level of b-hCG is it that normal pregnancy can be earliest detected by TVS (transvaginal USG)? A 500 IU/mL B 1000 IU/mL C 1500 IU/mL D 2000 IU/mL 💡 Explanation At what level of b-hCG is it that normal pregnancy can be earliest detected by TVS (transvaginal USG)? ✓ Correct Answer: B. 1000 IU/mL