因母气不能自运，故难产，当补其母之气，则儿健易产矣，遂于大全方紫苏饮加参术补
气药，随母形色禀性，参时加减，名曰达生散。人参、白术，白芍、当归、腹皮、紫
苏、陈皮、甘草，加枳壳，砂仁，胜于瘦胎散多矣。
胎前用药，清热养血为主，而清热养血之后，惟以补脾为要，
此培后天元气之本也。若养葵则不用芩、术，而以地黄饮加杜、续
以补肾，夫胎系于肾，肾固则胎自安，此补脾不如补肾之要妙也。各具至理，察候用之。然劳神动怒，情欲
之火俱能堕胎，盖原其故，皆因于热。夫火能消物，造化自然，如惯堕之妇，或食少而中气不调，且
不必养血，先理脾胃，次服补中益气汤，脾胃旺饮食强，方能气血有自而生也。
女之肾脏系于胎，是母之真气，而子所赖以生长者也。受妊之后，宜令镇静，则血气安和，内远
七情，外薄五味，大冷大热之物皆在所禁，雾露风邪不得乘间而入，亦不得交合阴阳，触动
欲火，谨节饮食。心气大惊而癫疾，肾气不足而解颅，脾气不和而羸瘦，心气虚乏而神不足，儿从母气，
不可不慎，苟无胎动、胎痛，泻痢、风寒外邪，不可轻易服药。
因为母体的气机不能自行运转，所以导致难产，应当补益母体的气，这样胎儿健壮就容易分娩了。于是基于《大全方》中的紫苏饮，加入人参、白术等补气药物，并根据孕妇的形体特征和禀赋性情，参考时节进行加减化裁，命名为“达生散”。方中用人参、白术、白芍、当归、大腹皮、紫苏、陈皮、甘草，若加枳壳、砂仁，其效果胜过瘦胎散许多。
怀孕期间的用药，以清热养血为主，而在清热养血之后，唯有补脾最为关键，这是培补后天元气根本的方法。如果是养葵（此处指特定体质或情况，原文似有脱误或特指某种补肾法对比），则不用黄芩、白术，而是用六味地黄丸加杜仲、续断来补肾。因为胎元系于肾，肾气坚固则胎元自然安稳，这是补脾不如补肾的精妙之处。这两种观点都蕴含至理，需观察证候后选用。然而，劳神过度、动怒以及情欲之火都能导致堕胎，推究其原因，都是因为热邪。火能消蚀万物，这是造化的自然规律。对于习惯性流产的妇女，如果饮食减少且中焦之气不调，暂不必急于养血，应先调理脾胃，其次服用补中益气汤。只有脾胃旺盛、饮食增强，气血才能自然化生。
女性的肾脏与胎元相连，这是母体的真气，也是胎儿赖以生长的基础。受孕之后，宜保持心境镇静，使血气安和，内在远离七情刺激，外在节制五味摄入，大冷大热的食物都在禁忌之列，雾露风邪不得趁机侵入，也不得行房事交合阴阳，触动欲火，谨慎节制饮食。若心气大惊会导致癫疾，肾气不足会导致解颅（囟门迟闭），脾气不和会导致身体羸弱消瘦，心气虚乏会导致精神不足。胎儿依附于母体之气，不可不谨慎。如果没有胎动、胎痛、泻痢以及风寒外邪等情况，不要轻易服药。
Since the mother's Qi cannot move independently, difficult labor occurs. One should tonify the mother's Qi, so that the fetus becomes robust and delivery is facilitated. Thus, based on Zi Su Yin (Perilla Decoction) from *Da Quan Fang* (Great Complete Formulas), Qi-tonifying herbs such as Renshen (Ginseng Radix et Rhizoma) and Baizhu (Atractylodis Macrocephalae Rhizoma) were added. The formula was modified according to the pregnant woman's physique, constitutional nature, and seasonal factors, and named Da Sheng San (Birth-Attaining Powder). Using Renshen (Ginseng Radix et Rhizoma), Baizhu (Atractylodis Macrocephalae Rhizoma), Baishao (Paeoniae Radix Alba), Danggui (Angelicae Sinensis Radix), Fupi (Mori Cortex / Atrapi Fructus - *Note: Text says 腹皮 likely referring to Dafupi or similar*, Zisu (Perillae Folium), Chenpi (Citri Reticulatae Pericarpium), Gancao (Glycyrrhizae Radix et Rhizoma), and adding Zhike (Aurantii Fructus Immaturus) and Sharen (Amomi Fructus Rotundus), its efficacy far surpasses that of Shou Tai San (Fetus-Thinning Powder).
During pregnancy, medication primarily focuses on clearing heat and nourishing blood. After clearing heat and nourishing blood, tonifying the Spleen is paramount, as this cultivates the root of acquired primordial Qi. In cases requiring kidney support (referenced as "Yang Kui" in text, likely a specific context or typo for a kidney-tonifying approach), Huangqin (Scutellariae Radix) and Baizhu (Atractylodis Macrocephalae Rhizoma) are not used; instead, Liuwei Dihuang Wan (Six-Ingredient Pill with Rehmannia) plus Duzhong (Eucommiae Cortex) and Xuduan (Dipsaci Radix) are employed to tonify the Kidney. Since the fetus is anchored by the Kidney, if Kidney Qi is solid, the fetus remains secure. This highlights the subtlety where tonifying the Kidney may be superior to tonifying the Spleen in certain contexts. Both approaches contain profound principles and should be applied after observing the syndrome. However, mental exertion, anger, and fire arising from emotional desires can all cause miscarriage. Investigating the cause, it is due to Heat. Fire consumes substances, which is a natural law of creation. For women with habitual miscarriages, if food intake is low and Middle Qi is disordered, one need not immediately nourish blood; instead, first regulate the Spleen and Stomach, then administer Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction). Only when Spleen and Stomach function is robust and diet is strong can Qi and Blood generate naturally.
The female Kidney system is connected to the fetus; it represents the mother's True Qi, upon which the fetus relies for growth. After conception, one should maintain tranquility so that Qi and Blood remain harmonious. Internally, avoid the Seven Emotions; externally, moderate the Five Flavors. Foods that are extremely cold or hot are prohibited. Mist, dew, wind, and pathogenic factors must not penetrate during intervals of weakness. Sexual intercourse, which stirs desire-fire, is also forbidden. Diet must be carefully regulated. If Heart Qi is greatly startled, epilepsy may result; if Kidney Qi is insufficient, Jie Lu (delayed closure of fontanelles) may occur; if Spleen Qi is disharmonious, emaciation may ensue; if Heart Qi is deficient, spiritual insufficiency may arise. The fetus depends on the mother's Qi, so caution is essential. Unless there are signs of fetal movement pain, fetal pain, diarrhea/dysentery, or external Wind-Cold pathogens, medications should not be taken lightly.