<prompt> Ullipristal acetate isGnRH agonistAndrogen antagonistSelective estrogen receptor modulatorSelective progesterone receptor modulator  <response>: Refer Harrinson 19e 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 