Abstract: This paper introduces YIN Sizhen's experience in diagnosis and treatment of gynecological diseases.YIN Sizhen was a famous gynecologist in Dingzhou of Baoding in the 1950s, ancestral Chinese medicine gynecology in three generations, practicing medicine for decades, with a wealth of clinical experience. This article is based on the oral contents of YIN Sizhen compiled by GUO Zhongyuan and ZHANG Fengchi of Hebei Academy of Traditional Chinese Medicine in 1960 to introduce his experience in gynecology. YIN Sizhen made an in-depth study of FU Qingzhu Nüke, payed attention to pulse-taking, realized that the focus of the book for the ups and downs of Yin and Yang. It is believed that most gynecological Re Zheng are based on deficiency of Yin and body fluid, rarely using antipyretic drugs with bitter cold; most of the gynecological Han Zheng are due to the insufficiency of Huo of Mingmen and Xinbao Luo and good at using of Yang warming drugs; good at Liqi and Huoxue drugs to regulate menstruation, as Yin and Yang, Qi and Xue are at peace, all syndromes can be cured.

Key words: YIN Sizhen, TCM Gynecology, clinical experience, Callosciatic bark, Morinda officinalis