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。
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).