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"Bi Chan Xu Zhi" (Necessary Knowledge for Childbirth) states: Ban Chan (spontaneous abortion/miscarriage) is commonly referred to as Xiao Chan (minor miscarriage), occurring at three or four months, or five or six months of pregnancy. All are termed Ban Chan because the male or female fetus has already taken shape by then. It may be caused by sorrow, fear, grief, or sudden anger; by physical exertion, beating, or trauma causing damage and disturbance; or by exposure to wind, cold, summer-heat, or heat pathogens. One must strictly avoid taking Re Medicines such as Hei Shen San (Black Divine Powder), lest other diseases arise. It is appropriate to take formulas such as Yu Zhu San (Jade Candle Powder) or He Jing Tang (Harmonizing Channels Decoction). Generally speaking, Xiao Chan should not be taken lightly; nursing and recuperation should be ten times more intensive than that for a full-term delivery.

Shen Zhai commented: When pregnancy is affected by the "Three Causes," Hei Shen San is indeed contraindicated, but Yu Zhu San should also not be administered casually.

Li Dongyuan stated: After childbirth, if a woman suffers from Ban Chan with persistent bleeding (Lou Xia), dizziness, fainting, unconsciousness, and closed eyes without awareness, it is due to the sudden massive loss of Yin Blood. After the loss of tangible blood, the Heart Spirit loses its nourishment. The Heart and Pericardium belong to Ministerial Fire and Sovereign Fire. They are peaceful when nourished by blood and endangered when blood is lost. With fire blazing upward, one becomes dizzy and faint. With fire invading the Lung, one closes the eyes. Unconsciousness occurs because the sudden loss of Yin Blood fails to provide stabilization and soothing. Since blood is already deficient, if physicians instead use bitter-sweet and extremely cold medicines like Shi Huai (Talcum), Gan Cao (Licorice Root), and Shi Gao (Gypsum) to drain heat from Qi, this constitutes draining Qi while Blood is deficient. Both are injured, resulting in a deficiency consumptive disease. Those who are comatose and unconscious have heat in the Upper Jiao (Heart and Lungs). This is formless heat; using cold-cooling medicines to drive it downward—do they not know that diseases of the Upper Jiao all belong to the Exterior syndrome, which is a Yin syndrome, and should be cured by sweating? Now, instead, purgatives are used, causing a sudden depletion of Qi and Blood. How can life last long? Do they not know what the "Nei Jing" (Inner Canon) says: when pathogenic Qi is insufficient, tonification is indicated rather than drainage. Diseases involving closed eyes all belong to Yin syndromes, where sweating is indicated rather than purgation. Do they not know that in Tai Yang Cold Damage with Yu Mao (depression and dizziness), recovery comes with sweating, which prohibits the use of cold-cooling medicines? In childbirth or Ban Chan, the original Qi is not diseased; only tangible blood is suddenly lost. When blood is lost, one should tonify blood. What doubt is there? Tonifying blood makes the Spirit vigorous. If blood descends and is lost, one should tonify and lift/raise [the Qi]. When the Heart receives blood, it is nourished, and the Spirit does not become confused. The violent descent of blood indicates that the influence of Autumn/Winter is too strong. By lifting and raising [the Qi], we assist Yang, so the eyes open and the Spirit does not become comatose. The formula I now prescribe consists of Sheng Di Huang (Raw Rehmannia Root) and Shu Di Huang (Prepared Rehmannia Root) forming Si Wu Tang (Four Substances Decoction), added with Hong Hua (Safflower), Xi Xin (Asarum), Man Jing Zi (Vernonia Fruit), Qiang Huo (Notopterygium Rhizome), Fang Feng (Saposhnikovia Root), Sheng Ma (Cimicifuga Rhizome), Chai Hu (Bupleurum Root), Ge Gen (Kudzu Root), Ben Cao (Ligusticum Rhizome), and Gan Cao (Licorice Root). This tonifies and nourishes blood, generates blood, benefits Yang, and supplements the insufficiency of the Hand and Foot Jueyin meridians. It is named Quan Sheng Huo Xue Tang (Complete Life Nourishing Blood Decoction).

Shen Zhai commented: Mr. Dongyuan's discussion is extremely profound. However, regarding Ban Chan leading to coma and unconsciousness, stating it is an Exterior disease of the Upper Jiao Heart and Lungs, and claiming it is cured by sweating, and citing the Tai Yang Cold Damage Yu Mao syndrome where sweating leads to recovery as a treatment method for Ban Chan—does he not know the principle that those who have lost blood should not be induced to sweat? Moreover, in his prescription, Wind-dispelling herbs greatly outnumber Blood-nourishing herbs. Although he claims the intent is to raise Yang, he uses not a single Qi-tonifying herb to support the depletion of blood. Therefore, I cannot help but doubt this theory and await correction.