Dr. Duan is a licensed OB/GYN in NY. Graduated in 1993. Medical degree obtained from Beijing, Peking University Health Science Center in China. Completed residency training at SUNY Downstate Medical Center. Currently practices at Haiou Duan Medical PC (Haiou Duan Medical PC), located at 715 51st St, Brooklyn, NY 11220. Dr. Duan specializes in A variety of obstetrics and gynecology diseases and health care, including irregular menstruation, irregular bleeding, uterine fibroids, pregnancy test and contraception, ring on the ring..... In addition to English, Dr. Duan speaks Mandarin.