Deer fetus ointment is a traditional Chinese medicine specially used for regulating menstruation of women. Its main functions are: tonifying qi and enriching blood, regulating menstruation and dispersing cold, and treating infertility. It is used for deficiency of qi and blood, weakness and emaciation, irregular menstruation, abdominal pain, cold and dampness. Chinese traditional Chinese medicine is extensive and profound, and the application of deer fetus ointment can be traced back to the partially lost prescription "Treatment of Women" by the famous medical scientist and medical sage Zhang Zhongjing at the end of the Eastern Han Dynasty. The essence of the prescription is one fetus and one medicine, which is boiled in a porcelain pot with a small fire. The resulting deer fetus ointment retains the essence of deer fetus itself and has magical curative effect.