At what level of b-hCG is it that normal pregnancy can be earliest detected by TVS (transvaginal USG)?
Ans. is b, i.e. 1000IU/MLRef Dutta Obs. 7/e, p 642Critical titre of hCG:b-hCG level (mIU/ml)Structure visibleTVS/TAS* 1000-1200Gestational sacTVS* 6000Gestational SacTAS
500 IU/mL
1000 IU/mL
1500 IU/mL
2000 IU/mL
Diagnosis in Obstetrics