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Li Shicai stated: The Yangming channel is referred to as the "Two Yangs." Why does injury to the Stomach lead to disease in the Heart and Spleen? The relationship between the Spleen and Stomach is like that of husband and wife; if the husband is injured, the wife is also adversely affected. The relationship between the Heart and Stomach is like that of mother and child; if the child is diseased, the mother cannot escape either. "Inability to disclose hidden matters" (referring to private ailments, such as sexual or reproductive dysfunction) belongs to disorders of Yang affairs. The Stomach is the sea of water and grain, and qi and blood; it transforms Ying and Wei (nutritive and defensive qi) and moistens the Zongjin (tendons of the anterior yin/genitals). The Treatise on Jue (Jue Lun) states: The anterior yin is the gathering place of the Zongjin, where the Taiyin (Spleen) and Yangming (Stomach) channels combine. The Treatise on Flaccidity (Wei Lun) states: All Yin and Yang channels converge at the Zongjin, with the Yangming channel acting as their leader. Therefore, Stomach disease leads to decline in Yang function. In cases of amenorrhea in women, the Heart governs Blood, the Spleen controls Blood, and the Stomach is the sea of Qi and Blood; disease in these three channels results in blood closure.

Shenzhai commented: The above eight items outline the syndromes of amenorrhea in women. Amenorrhea was first discussed in the *Huangdi Neijing* (Yellow Emperor's Inner Canon) as "diseases of the Two Yang affecting the Heart and Spleen." Here, the discussions of various physicians from Jiegu (Zhang Yuansu) onwards are collected to elucidate the canonical principles. Generally, they all advocate establishing the theory based on the Spleen and Stomach. Only one point by Shuqing differs, attributing the condition to Qi stagnation, which contrasts with other physicians.

The *Jingui Yaolue* (Essential Prescriptions from the Golden Cabinet) states: Women's diseases often arise from deficiency, accumulation of cold, and constrained Qi, leading to the cessation of menstruation, sometimes persisting for years. Cold blood accumulates in the Baomen (uterine gate), injuring the meridians, resulting in thirty-six types of gynecological diseases with myriad variations.

Qi Zhongfu stated: When a woman's menstruation fails to arrive, it is due to wind-cold pathogens lodging in the Baomen, or sexual intercourse while intoxicated, or due to falling from exposure to wind, or fright and shock, all of which cause obstruction. The *Zhubing Yuanhou Lun* (Treatise on the Pathogenesis and Symptoms of All Diseases) states: Blood flows freely when warm but coagulates and becomes sluggish when cold. If menstruation does not arrive, it may be because the Stomach Fu organ is cold, or due to sexual activity while intoxicated, causing depletion of internal Qi and injury to the Liver channel; or due to hematemesis, epistaxis, or massive hemorrhage, leading to exhaustion of blood within.

Wang Ziheng stated: Menstrual obstruction in women originates in the Stomach. Deficient Stomach Qi fails to digest food and drink, preventing Jin Ye (body fluids) from transforming into Qi and Blood. He further stated that sexual activity while intoxicated exhausts internal Qi and injures the Liver, causing scanty menstruation. This is because the Liver stores Blood; excessive labor and injury lead to exhaustion of Qi and Blood internally. Additionally, prior hematemesis, or hematemesis accompanied by lower bleeding, is termed Tuoxue (loss of blood), known as Xueku (blood exhaustion), which also prevents menstruation. This occurs because of the reduction and consumption of Jin Ye. By replenishing Jin Ye, the menses will naturally resume.

Shenzhai commented: The above three items discuss menstrual obstruction in women, attributing it to accumulated wind-cold, which causes blood to coagulate and become sluggish, thereby obstructing menstruation.