大全云∶大凡生产，自有时候，未见时候，切不可强服催生滑胎等药，或势不得已则服
之。又云，切不可坐早，及令稳婆乱动手（凡催生药必候腰痛甚，胎转向下，浆水破，方可
服）。大法滑以流通涩滞，苦以驱逐闭塞，香以开窍逐血，气滞者行气，胞浆先破，疾困者固
血。（固血如闸水放舟，最稳当）
丹溪云∶催生只用佛手散，最稳当，又效捷。
大全云∶妇人以血为主，惟气顺则血和，胎安则产顺。今富贵之家，过于安逸，以致气
滞而胎不转，或为交合，使精血聚于胞中，皆致产难。若腹或痛或止，名元胎，稳婆不悟，
入手试水，致胞破浆干，儿难转身，亦难生矣。凡产直候痛极，儿逼产门，方可坐草，时当盛
暑，倘或血晕血溢，当饮清水解之（血晕血溢，以水解之，在暑月尤宜，余月亦无害，惟少与
之）。冬末春初，产室用火和暖，下部衣服，尤当温浓，方免胎寒血结，若临月洗头濯足，亦致产难。
丹溪曰∶世之难产者，往往见于郁闷安逸之人，富贵奉养之家，若贫贱辛苦者，无有也。
古方书止有瘦胎饮一论，而其方为湖阳公主
作也，实非极至之言。何也？见有用此方者，其难自若。予表妹苦于难产，后遇胎孕，则触
而去之，予甚悯焉，视其形肥，勤于针黹，寻思旬日，忽自悟曰∶此正与湖阳公主相反，彼奉
养之人，其气必实，耗其气，使平和，故易产。今形肥，知其气虚，久坐知其不运，必气愈弱，
儿在胞胎，用母气不能自运耳，当补其母之气，则儿健易产矣。令其有孕至六七个月来
告，遂以大全方紫苏饮（主紫苏饮，最稳当可法），加补气药，与数十帖，因得儿而甚快。后
遂以此方随母形色性禀，参时令加减与之，无不应者，因名其方曰达生散。
《产宝大全》说：大凡分娩，自有其时辰，未见临产征兆时，切不可强行服用催生、滑胎等药物，除非形势迫不得已才服用。又说，切不可过早坐草（指产妇上床准备分娩），以及让稳婆乱动手脚。（凡是催生的药物，必须等到腰痛剧烈，胎儿转向下方，羊水破裂后，才可以服用。）大法则是：用滑利之药以流通涩滞，用苦味之药以驱逐闭塞，用芳香之药以开窍逐瘀；气滞者行气，胞浆先破且病情危急者固摄血液。（固血如同闸门放水放船，最为稳妥妥当）
《产宝大全》说：妇女以血为主，只有气顺则血和，胎安则产顺。如今富贵人家，过于安逸，导致气机阻滞而胎儿不转动，或者因为性交，使精血聚于胞宫，都导致难产。如果腹部有时疼痛有时停止，称为“元胎”（假阵痛），稳婆不明白，就上手试探羊水，导致胞衣破裂、羊水干涸，胎儿难以转身，也就很难生下来了。凡是分娩，直接等待疼痛达到极点，胎儿逼迫产门时，才可以坐草。当时若逢盛夏酷暑，倘若出现血晕或血溢，应当饮用清水来解除（血晕血溢，用水来解，在暑月尤其适宜，其他月份也无害，只是少量给予）。冬末春初，产房用火取暖，下部衣物，尤其应当温暖浓厚，才能避免胎寒血结，如果在临近预产期洗头洗脚，也会导致难产。
朱丹溪说：世间的难产者，往往出现在郁闷安逸的人身上，富贵奉养之家，如果是贫贱辛苦劳作的人，就没有这种情况。古方书中只有瘦胎饮这一论述，而其方是为湖阳公主所创，确实不是极至之言。为什么呢？看见有人使用此方，其难产情况依旧如故。我的表妹苦于难产，后来遇到怀孕，就触怒而去掉胎儿，我很怜悯她，观察她形体肥胖，勤于针线活，思考了十天，忽然自己领悟说：这正好与湖阳公主相反，那些奉养之人，其气必实，消耗其气，使其平和，所以容易生产。现在她形体肥胖，知道她气虚，久坐知道她不运，必定气更弱，胎儿在胞胎中，依靠母亲的气不能自行运转，应当补益母亲的气，那么胎儿健壮就容易生产了。让她怀孕到六七个月时来告知，于是用《大全》中的紫苏饮（主治紫苏饮，最稳妥妥当可效法），加入补气药，给了几十帖，因此很快生下孩子。后来就以此方根据母亲的形色禀性，参考时令加减给予，没有不应验的，因此将方名命名为达生散。
The *Chanbao Daquan* (Comprehensive Essential Records of Obstetrics) states: Generally, childbirth has its own appointed time. Before the signs of labor appear, one must absolutely not forcibly administer drugs for inducing labor or promoting fetal descent, unless circumstances leave no other choice. It further states that one must absolutely not sit on the birthing mat too early, nor allow midwives to handle the patient recklessly. (All labor-inducing medicines must be waited until severe lower back pain occurs, the fetus turns downward, and the amniotic fluid breaks before administration.) The general principle is: use slippery agents to unblock stagnation, bitter agents to expel obstruction, aromatic agents to open orifices and drive out blood stasis; regulate Qi for Qi stagnation, and consolidate Blood for cases where the amniotic sac ruptures prematurely and the condition is critical. (Consolidating Blood is like releasing a boat from a sluice gate, which is the safest and most appropriate method.)
Zhu Danxi stated: For inducing labor, only Foshou San (Buddha's Hand Powder) should be used; it is the safest and most effective.
The *Chanbao Daquan* states: Women are governed by Blood. Only when Qi flows smoothly will Blood harmonize, and only when the fetus is secure will delivery proceed smoothly. Nowadays, families of wealth and status are overly comfortable and idle, leading to Qi stagnation and failure of the fetus to rotate. Alternatively, sexual intercourse may cause essence and Blood to gather in the uterus, both resulting in difficult labor. If abdominal pain comes and goes intermittently, it is called "Yuan Tai" (false labor). Midwives who do not understand this may probe the membranes, causing rupture of the amniotic sac and drying of the amniotic fluid, making it difficult for the fetus to turn and thus difficult to deliver. One should wait until labor pains are at their peak and the fetus presses against the birth canal before sitting on the birthing mat. If this occurs during the height of summer and syncope due to blood loss or excessive bleeding occurs, drinking clear water can resolve it. (Using water to treat syncope or bleeding is especially suitable in summer months, and harmless in others, provided it is given in small amounts.) In late winter and early spring, the delivery room should be warmed with fire, and clothing covering the lower body should be particularly warm and thick to avoid cold damaging the fetus and congealing the Blood. Washing hair and feet near the time of delivery may also lead to difficult labor.
Zhu Danxi said: Difficult labor in the world often occurs in people who are depressed and idle, specifically those living in luxury. It is rarely seen among the poor and hardworking. Ancient medical texts only discuss the Shoutai Yin (Fetus-Thinning Decoction), created for Princess Huyang, but this is not the ultimate truth. Why? Because I have seen those using this formula still experience difficulty as before. My cousin suffered greatly from difficult labor; upon becoming pregnant again, she would abort out of fear. I pitied her greatly. Observing that she was obese yet diligent in needlework, I pondered for ten days and suddenly realized: This situation is exactly opposite to that of Princess Huyang. Those living in luxury likely have Excess Qi; consuming their Qi to bring it to balance makes delivery easier. Now, since she is obese, I know her Qi is Deficient. Her prolonged sitting indicates lack of movement, meaning her Qi is even weaker. The fetus in the womb relies on the mother's Qi to move; therefore, we must tonify the mother's Qi so the fetus becomes vigorous and delivery easy. I instructed her to return when she was six or seven months pregnant. I prescribed Zisu Yin (Perilla Leaf Decoction) from the *Daquan*, adding herbs to tonify Qi, administered over dozens of doses. She delivered quickly thereafter. Subsequently, I modified this formula according to each mother's physique, constitution, and seasonal changes, with consistent success. Thus, I named the formula Dasheng San (Life-Reaching Powder).