Gynaecology & Obstetrics In azoospermia, the diagnostic test which can distinguish between testicular failure and obstruction of Vas deferens is : A Estimation of FSH level B Estimation of testosterone level C Karyotyping D FNAC of testes 💡 Explanation In azoospermia, the diagnostic test which can distinguish between testicular failure and obstruction of Vas deferens is : ✓ Correct Answer: A. Estimation of FSH level