A male with azoospermia. On examination size of testis is normal. FSH and testosterone levels are within normal limits. Most probable cause is:: (A) Non-descended testis, (B) Klinefelter's syndrome, (C) Kallmann's syndrome, (D) VAS obstruction
Answer is D. Normal levels of FSH with azoospermia suggests obstructive lesions in the vas or epididymis. High FSH and LH may indicate primary gonadal failure-testicular Dysfunction. Low level of FSH and LH suggest hypogonadotropic hypogonadism. Shaw's Textbook of Gynaecology 16th edition page no 244