A middle-aged female presents with increasing visual loss, breast enlargement, and irregular menses. What is the most appropriate investigation to diagnose the underlying condition?
AS. calcitonin
BS. prolactin
CS. hemoglobin concentration
DS. calcium
At what age is delayed puberty diagnosed in girls if they have not developed any secondary sexual characteristics?
A13 years
B18 years
C12 years
D16 years
What is the mechanism by which hyperprolactinemia causes amenorrhea?
AInhibition of adrenal steroidogenesis
BIt causes hypogonadotropic hypogonadism
CInhibition of GnRH pulse secretion
DIt leads to decreased ovarian function due to low FSH and LH levels
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