Ullipristal acetate is: (A) GnRH agonist, (B) Androgen antagonist, (C) Selective estrogen receptor modulator, (D) Selective progesterone receptor modulator
Answer is D. 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