Deslorelin (brand name Suprelorin®) also commonly referred to as a 'hormone implant', is a subcutaneous implant used 'off label' in birds. The implant contains deslorelin, a gonadotropine-releasing hormone (GnRH) drug. This suppresses (blocks) the production of follicle stimulating hormone (FSH) and luteinizing hormone (LH).

The drug is formulated in an implant that is designed to remain in place underneath the bird’s skin. After implantation, it softens and flattens.

The implant comes pre-packed in a single-dose sterile syringe and needle. There are two versions, containing either 4.7 or 9.4 mg of deslorelin. After the implant is inserted, the drug is released slowly and continuously at low doses over time. Hormone implants are a form of medical therapy used to decrease reproductive activity in female birds. It consists of periodic hormone implants or injections that are intended to alter the reproductive cycle of the bird.



Over time, hormone implants may start to become less effective on birds that receive treatment, causing them to require more frequent dosing and to use higher dosages in order to get the same effect.