FSH & LH STIMULATION BY GONADOTROPIN RELEASING HORMONE (GNRH)

What this test checks

After giving GnRH, measures how FSH and LH respond — assesses whether the brain-gonad hormone system is working.

Why do people get this test?

Used in delayed or precocious puberty and certain fertility evaluations.

When you should consider this test

• Delayed puberty
• Early puberty
• Specialist fertility work-up

How to prepare

Performed by specialist staff — involves an injection and several blood draws.