LH-RH means Luteinizing Hormone-Releasing Hormone. It is a Releasing hormone, i.e. a hormone whose main purpose is to control the release of another hormone, here the Luteinizing hormone.
LH-RH means Luteinizing Hormone-Releasing Hormone. It is a Releasing hormone, i.e. a hormone whose main purpose is to control the release of another hormone, here the Luteinizing hormone.