Ganirelix
（重定向自Ganirelix acetate）
![](/Images/godic/202501/14/Ganirelix.svg3810.png")
![Location of the hypothalamus. GnRH is released from the hypothalamus, and subsequently acts on GnRH receptors on the anterior pituitary.](/Images/godic/202501/14/Hypothalamus3811.gif")
Ganirelix acetate (or diacetate) is an injectable competitive gonadotropin-releasing hormone antagonist (GnRH antagonist). It is primarily used in assisted reproduction to control ovulation. The drug works by blocking the action of GnRH upon the pituitary, thus rapidly suppressing the production and action of LH and FSH. Ganirelix is used in fertility treatment to prevent premature ovulation that could result in the harvesting of eggs that are too immature to be used in procedures such as in vitro fertilisation.