Inform your doctor if you are on any medications, have any allergies or underlying medical conditions before your Fsh And Lh Stimulation By Gonadotropin Releasing Hormone (Gnrh) Chemiluminesence Blood Serum. Your doctor will give specific instructions depending on your condition on how to prepare for Fsh And Lh Stimulation By Gonadotropin Releasing Hormone (Gnrh) Chemiluminesence Blood Serum.