Prince Mishaal bin Majed bin Abdulaziz, Governor of Jeddah, will open here on Monday the 21st annual scientific conference entitled "Challenges in Women's Health" to be organized by Saudi Society of Obstetrics and Gynecology, in cooperation with the Asian Organization of Gynecology and Obstetrics. As many as 400 doctors and researchers in the fields of obstetrics and gynecology from the Kingdom of Saudi Arabia and various countries will take part in the four-day Conference.