Ullipristal acetate is
GnRH agonist
Androgen antagonist
Selective estrogen receptor modulator
Selective progesterone receptor modulator
Refer Harrinson 19/e p 2391 Ullipristal is a selective progesterone receptor modulator like mifepristone It is used as an emergency contraceptive that can be used within 120 hours of unprotected intercourse
Endocrinology