Measuring the blood levels of FSH, LH, testosterone
and prolactin are essential in selected cases. Normal sperm production
and sexual function are dependent on normal hormonal environments. The
measurement of FSH and LH levels can be valuable in distinguishing patients
with azoospermia. Those patients who have azoospermia due to an obstruction
have normal FSH levels, meanwhile those patients whose testes are not
making sperm have raised FSH levels. Low levels of FSH and LH may indicate
that the pituitary gland is not producing enough hormones and there
is therefore the possibility of effective hormone treatment.
