Honoria Dizon Acosta-Sison (30 December 1888 â 19 January 1970) was the first Filipino woman to become a medical doctor.
She was born in Calasiao, Pangasinan in the Philippines and graduated from the Woman's Medical College of Pennsylvania (later absorbed by Drexel University) in 1909. In 1910 she married the director of the Philippine General Hospital of Manila, where she first worked as assistant in obstetrics. She later was first assistant in obstetrics in St. Paul's Hospital in Manila, and in 1914 she became a faculty member at the University of the Philippines. By 1940 she was professor of obstetrics and gynecology and head of the department of obstetrics there.
She was known internationally for her research on trophoblastic diseases and pre-eclampsia in pregnancy.