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The treatment principles for both male and female departments are essentially the same, with the differences lying in women's specific conditions such as regulating menstruation (Tiaojing), metrorrhagia (Benglou), and leukorrhea (Daixia). Regarding fertility, prenatal care, postpartum recovery, as well as diseases of the anterior yin (Qianyin) and breasts, they are not the same as those in men.

[Note] Various diseases in women are fundamentally no different from those in men; therefore, their treatment principles are identical. The aspects that differ from men lie solely in regulating menstruation, amenorrhea, turbid leukorrhea, metrorrhagia, metrostaxis, zhang masses (Jia), fertility, prenatal and postpartum conditions, as well as breast diseases and anterior yin syndromes. Hence, a separate department for gynecology is established to categorize and treat these conditions in detail. Practitioners of this specialty must first study texts on pulse diagnosis and clinical methods, and then read this book, which will naturally lead to a profound understanding.

Congenital Tian Gui (Heavenly Water/Menstrual Essence) originates from parents, while postnatal Jing Blood (Essence and Blood) is generated from water and grain (dietary nutrients). When a girl reaches fourteen years old (two times seven), Tian Gui arrives, the Ren Mai (Conception Vessel) becomes unobstructed, the Chong Mai (Penetrating Vessel) becomes abundant, and menstruation occurs regularly.

[Note] Congenital Tian Gui refers to the moving Qi within the kidney, inherited from parents, serving as the beginning of life. Postnatal Jing Blood refers to what is transformed from dietary intake, acquired after physical formation, serving to nourish life. The Classic states that at one times seven (seven years old), the Kidney Qi is abundant, referring to the abundance of the moving Qi within the kidney. At two times seven (fourteen years old), Tian Gui arrives, meaning the moving Qi within the congenital Gui water reaches the uterus (Zigong). The Chong Mai is the Sea of Blood, and the Ren Mai governs pregnancy. Both the Chong and Ren vessels originate from the uterus; thus, when the Ren Mai is unobstructed and the Tai Chong Mai (Chong Mai) is abundant, menstruation occurs regularly, enabling conception.

Infertility is often caused by damage to the Ren and Chong vessels, irregular menstruation, leukorrhea, menstrual leakage, or heavy menstrual bleeding. It may also result from blood stasis accumulation, uterine cold or heat, or phlegm-fluid retention and fatty tissue obstructing the uterus.

[Note] The cause of infertility in women lies in the damage to the Ren and Chong vessels. The Classic states: At two times seven (fourteen years old), Tian Gui arrives, the Ren Mai is unobstructed, the Tai Chong Mai is abundant, menstruation occurs regularly, and conception is possible. If pathogenic factors from the Three Causes (internal, external, and neither internal nor external) damage the Chong and Ren vessels, conditions such as irregular menstruation, red and white leukorrhea, menstrual leakage, and metrorrhagia may arise. Alternatively, it may be due to old blood accumulating in the uterus, preventing new blood from forming an embryo; or due to uterine cold or heat imbalance, preventing the reception of sperm for conception; or due to obesity and excessive phlegm, where fatty tissue obstructs the uterus, leading to infertility. In all cases, the etiology should be carefully examined, and treatment should be adjusted according to the syndrome, allowing conception to occur naturally.