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Chen Ziming stated: The Lung internally governs Qi and externally controls the skin and hair. If the skin and hair are not dense, Cold pathogenic factors will take advantage of this deficiency to enter and attack the Lung, causing cough. The Qi of the Five Zang organs and Six Fu organs all derives from the Lung; each organ may become diseased by contracting Cold in its corresponding season. In Autumn, the Lung is affected; in Winter, the Kidney; in Spring, the Liver; in Summer, the Heart; and in Late Summer (the final phase of summer), the Spleen. If cough persists without cessation, it transmits to the Fu organs. Cough occurring during pregnancy is termed "Zisu" (Fetal Cough). Prolonged coughing that does not cease will damage the Fetus.

Zhu Danxi stated: Cough during pregnancy arises because Jing-Yin (Essence-Fluid) and Blood gather to nourish the fetal origin, leaving the Lung lacking in moistening and lubrication, compounded by constrained Fire flaring upward. The treatment principle should focus on moistening the Lung, primarily using Tiandong Tang (Asparagus Root Decoction).

Xue Lizhai stated: For the aforementioned conditions, if Wind pathogenic factors injure the Lung in Autumn, use Jinfeicao San (Boiling Herb Powder); if Fire pathogenic factors overcome Metal (Lung) in Summer, use Renshen Pingfei San (Ginseng Lung-Pacifying Powder); if Cold pathogenic factors injure the Lung in Winter, use Renshen Baidu San (Ginseng Rescue the Extremities Powder); if Wind pathogenic factors injure the Lung in Spring, use Shensu Yin (Ginseng and Perilla Drink). If there is Qi deficiency of the Spleen and Lung, use Liujunzi Tang (Six Gentlemen Decoction) added with Danggui (Angelica Sinensis) and Chuanxiong (Sichuan Lovage Rhizome), and Jiegeng (Platycodon Root). If Kidney Fire flares upward, use Liuwei Wan (Six-Ingredient Pill) added with Wuweizi (Schisandra Berry). If there is Qi deficiency of the Spleen and Stomach, injured by Wind-Cold, use Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction) added with Sangbaipi (Mulberry Bark), Xingren (Apricot Seed), and Jiegeng. If there is Blood deficiency, use Siwu Tang (Four Substance Decoction) added with Sangbaipi, Xingren, and Jiegeng. Generally, since the Lung belongs to Xin-Metal and is born from Ji-Earth (Spleen), persistent cough often results from Spleen deficiency failing to generate Lung Qi, leading to loose interstices and susceptibility to external pathogens. Or, due to Lung deficiency failing to generate Water, causing Yin Fire to flare upward. The treatment method should strengthen Earth and Metal, generate Kidney Water, with stabilizing the fetus as the priority.

Shenzhai commented: The above three passages describe the syndrome of cough during pregnancy. Cough belongs to Lung disease; *Daquan* attributes it to external contraction of Cold pathogenic factors, while Danxi attributes it to internal injury causing Lung dryness. As for Lizhai, he differentiated based on the pathogenic factors contracted in the four seasons, stating that all five Zang organs can be affected, distinguishing between Wind-Cold-Fire and between external contraction and internal injury. Although these do not exclusively discuss fetal cough, the treatment methods are not significantly different, generally incorporating fetal stabilization as a main component.

Wan Muzhai stated: For Typhoid Fever (Shanghan) occurring during pregnancy, the primary approach is clearing Heat and stabilizing the fetus. Whether inducing sweating or purging, treatment should follow the pulse and symptoms manifested in the exterior-interior relationships of the five Zang organs, ensuring not to disturb the fetal Qi.