A male with azoospermia. On examination size of testis is normal. FSH and testosterone levels are within normal limits. Most probable cause is:
Non-descended testis
Klinefelter's syndrome
Kallmann's syndrome
VAS obstruction
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
Infertility