Luteinizing (pronounced loo·tuh·nai·zing, in case you were wondering) hormone plays a key role in sexual development in all of our bodies. In male reproductive systems, LH triggers the testicles to make testosterone, and in female reproductive systems, well … you can read more on that in the section below.

Summary A luteinizing hormone test measures how much luteinizing hormone a person has in their blood. This is a hormone with key roles in both male and female reproductive systems..