FSH, LH, Prolactin, Testosterone test is to detect a man with low testosterone. When low or normal FSH and LH levels accompany low testosterone, evaluation of the pituitary gland is recommended. Blood serum is used for the estimation of the serum levels of prolactin and testosterone
Serum testosterone measurements are considered the initial test of choice be-cause they’re reliable, inexpensive, and widely available. Testosterone levels vary from hour to hour and diurnally, so a repeat morning measurement is recommended to confirm subnormal levels.
