Gonadotropin surge-attenuating factor
Gonadotropin surge-attenuating factor (GnSAF) is a nonsteroidal ovarian hormone produced by the granulosa cells of small antral ovarian follicles in females. GnSAF is involved in regulating the secretion of luteinizing hormone (LH) from the anterior pituitary and the ovarian cycle.
Source: Wikipedia — Gonadotropin surge-attenuating factor (CC BY-SA 4.0)