(Merial) Cystorelin is indicated for the treatment of ovarian follicular cysts in dairy cattle. Ovarian cysts are nonovulated follicles with incomplete luteinization, which can result in nymphomania or irregular estrus. Each ml of Cystorelin solution contains 50 micrograms gonadorelin (GnRH) diacetate tetrahydrate. The recommended dosage of Cystorelin is 100 mcg (2 ml) per cow, given IV or IM. Gonadorelin (GnRH) diacetate tetrahydrate.