治逆产横生，其功甚大。
百草霜 白芷（不见火，各为末，等分
上每服三钱，以童便、米醋和如膏，加沸汤调下，或用酒煎，加入童便少许，热服。书云
∶血见黑则止，此药不但顺生，大能固血，又免血枯，为妙。
杨子建云∶凡生产，先知此十症，庶母子两命，皆得保全。世之收生者，殊少精良妙手
多致误事，予因痛切而备言之。
一曰正产。怀胎十月，阴阳气足，忽然腰腹齐痛，儿自转身，头向产门，浆破血下，儿
二曰催产。儿头至产门，腰腹齐痛，仍不产者，方服药催之。或经日久，产母困倦难生
宜服药以助气血，令儿速生。
三曰伤产。怀胎未足月，有所伤动，以致脐腹疼痛，忽然欲产。或妄服催药，逼儿速生
如此生息，未必无伤，慎之。
四曰冻产。天气寒冷，产母血气凝滞，难以速生，则衣服宜浓，产室宜暖，下衣更宜温
浓，庶儿易生。更不宜火气太热，恐致血晕。
五曰热产。盛暑之月，产妇当温凉得中，过热则头目昏眩，而生血晕之症。若凉台水阁
以及狂风阴雨，更当谨避。
六曰横生。言儿方转身，产母用力太急，逼令儿身不正，当着产母安然仰睡，令老练稳
婆先推儿身顺重，头对产门，以中指探儿肩，不令脐带扳羁，然后用药催之，再令产妇努力
七曰倒产。言儿并未转身，产母妄自努力，致令手脚先出。当着产母安然仰睡，令稳婆
轻手推入，候儿自顺。若良久不生，令稳婆手入产户，就一边拨儿转顺产门，却服催生药，
八曰偏产。言儿虽已转身，但未顺生路，产母急于努力，逼儿头偏一边，虽露顶，非也
乃额角耳。当令产母仰睡，稳婆轻手扶正其头，却服催药，并努力，儿即下。若儿顶后骨
偏注谷道， 额，令稳婆以绵衣烘暖，裹手于谷道外傍，轻手托正，令产母努力，儿即生
产母仰卧，稳婆轻手推儿向上，以中指按儿肩，脱去脐带，仍令儿身正顺，产母努力，儿即
十曰∶盘肠产。临产子肠先出，然后生子。肠出时，以极洁净，不破损漆器盛之。古方
用萆麻子四十九粒，研烂，涂产母头顶，肠收上，急洗去。其肠若干，以磨刀水少许，温
润之，再用磁石煎汤服之即收上。磁石，须阴阳家用过有验者。古法，有用醋水 母面
、背者，恐惊则气散，深为未便。又方，大指拈麻油润之，点灯吹熄，以烟熏产妇鼻中，肠
以上十产论，可谓精且密矣，而交骨不开，尚未论及，足见医道繁难，不容浮躁者问津
治疗难产、胎位不正，此药功效显著。
百草霜、白芷（均不可经火炒制，分别研为细末，取等量）
每次服用三钱，用童子尿和米醋调和成膏状，加入沸水冲服；或者用酒煎煮，加入少许童子尿，趁热服用。书上说：“血遇到黑色就会停止”，此药不仅能帮助顺产，更能固摄血液，避免血虚枯竭，非常奇妙。
杨子建说：凡是分娩，先要知晓这十种情况，这样母子两条命才能都得到保全。世间接生的人，很少有好手，大多导致误事，我因此痛切地详细论述。
第一种叫正产。怀孕满十月，阴阳之气充足，忽然腰腹同时疼痛，胎儿自己转身，头朝向产门，羊水破裂出血，胎儿自然产出。
第二种叫催产。胎儿头部已到产门，腰腹同时疼痛，仍然不生产的，才服药催促生产。或者经过日子太久，产妇疲倦难以生产，应该服药以辅助气血，让胎儿快速出生。
第三种叫伤产。怀孕未满月，受到损伤触动，导致脐腹疼痛，忽然想要生产。或者胡乱服用催产药，逼迫胎儿快速出生，像这样出生的婴儿，未必没有伤害，务必谨慎。
第四种叫冻产。天气寒冷，产妇气血凝滞，难以快速生产，那么衣服应该穿得厚实，产房应该温暖，下身衣物更要温厚，这样胎儿容易出生。更不应该用火烤得太热，恐怕导致血晕。
第五种叫热产。盛夏月份，产妇应当保持温度适中，过热则会导致头目昏眩，产生血晕的症状。如果在凉台水阁，以及狂风阴雨天气，更应当小心避开。
第六种叫横生。说的是胎儿正在转身时，产妇用力太急，逼迫胎儿身体不正，应当让产妇安然仰卧，让经验丰富的稳婆先将胎儿身体推顺，头对产门，用中指探摸胎儿肩膀，不让脐带缠绕羁绊，然后用药催产，再让产妇努力。
第七种叫倒产。说的是胎儿并未转身，产妇胡乱用力，导致手脚先出来。应当让产妇安然仰卧，让稳婆轻轻将手脚推回，等候胎儿自然理顺。如果很久不生，让稳婆手入产道，在一边拨动胎儿转向产门，却服用催产药，
第八种叫偏产。说的是胎儿虽然已转身，但未顺产路，产妇急于用力，逼迫胎儿头偏向一边，虽然露出头顶，其实不是头顶，而是额角耳朵处。当让产妇仰卧，稳婆轻轻扶正其头，却服用催产药，并努力，胎儿即可生下。如果胎儿后脑骨偏向谷道（肛门），额头朝上，让稳婆用棉衣烘暖，包裹手在谷道外旁，轻轻托正，让产妇努力，胎儿即生。
第九种叫坐产。产妇仰卧，稳婆轻轻将胎儿向上推，用中指按胎儿肩膀，脱去脐带，仍让胎儿身体正顺，产妇努力，胎儿即
第十种叫盘肠产。临产时子宫先脱出，然后生出胎儿。肠子脱出时，用极其洁净、不破损的漆器盛放。古方
用蓖麻子四十九粒，研烂，涂在产妇头顶，肠子收回后，急忙洗去。脱出的肠子多少，用磨刀水少许，温润它，再用磁石煎汤服用即收回。磁石，须是阴阳家使用过有验证的。古法，有用醋水擦母面
、背的，恐怕惊吓则气散，深为不便。又一方，大指捻麻油润之，点灯吹熄，以烟熏产妇鼻中，肠
以上十产论，可以说精妙且周密了，但交骨不开的情况，尚未论及，足见医道繁难，不容浮躁者问津
For treating difficult labor and malpresentation, its efficacy is significant.
Bai Cao Shuang (Soot from hundred-year-old stove) and Bai Zhi (Angelicae Dahuricae Radix) (neither should be processed by fire; each ground into fine powder, in equal parts).
Take 3 qian per dose. Mix with child's urine (Tong Bian) and rice vinegar to form a paste. Add boiling water and take orally; or decoct with wine, add a small amount of child's urine, and take hot. The book states: "Blood stops when it sees black." This medicine not only facilitates normal delivery but also strongly consolidates blood, preventing blood depletion, which is wonderful.
Yang Zijian said: In all deliveries, one must first know these ten conditions, so that both mother and child may be saved. Midwives in the world are rarely skilled, often causing errors. I therefore discuss them in detail out of deep concern.
The first is called Zheng Chan (Normal Delivery). After ten months of pregnancy, when yin and yang qi are sufficient, sudden pain in the waist and abdomen occurs. The fetus turns itself, facing the birth canal. Amniotic fluid breaks, blood flows, and the baby is born naturally.
The second is called Cui Chan (Induced Labor). When the fetal head has reached the birth canal and there is simultaneous waist and abdominal pain, but delivery does not occur, then administer medicine to induce labor. Or if the duration is too long and the mother is exhausted and unable to deliver, administer medicine to support qi and blood, enabling the fetus to be born quickly.
The third is called Shang Chan (Traumatic Labor). Pregnancy is not yet full-term. Due to injury or disturbance, umbilical and abdominal pain occurs, leading to sudden desire to deliver. Or if催产 medicines are taken recklessly, forcing the fetus to be born quickly. Such births may cause injury to the infant; caution is required.
The fourth is called Dong Chan (Cold Labor). In cold weather, the mother's qi and blood stagnate, making rapid delivery difficult. Therefore, clothing should be thick, the delivery room warm, and lower garments even warmer, so the fetus can be born easily. One must avoid excessive heat from fire, lest it cause syncope due to blood loss (Xue Yun).
The fifth is called Re Chan (Hot Labor). In midsummer, the parturient should maintain a moderate temperature. Overheating causes dizziness and vertigo, leading to syncope due to blood loss. One must carefully avoid cool pavilions, water towers, strong winds, and rainy days.
The sixth is called Heng Chan (Transverse Presentation). This refers to the situation where the fetus is turning, but the mother exerts force too urgently, forcing the fetal body into an abnormal position. The mother should lie comfortably on her back. An experienced midwife should first push the fetal body to align with gravity, head towards the birth canal. Using the middle finger to probe the fetal shoulder ensures the umbilical cord is not tangled. Then, administer medicine to induce labor, and instruct the mother to push.
The seventh is called Dao Chan (Breech Presentation). This refers to the situation where the fetus has not turned, but the mother exerts force recklessly, causing hands or feet to emerge first. The mother should lie comfortably on her back. The midwife should gently push the limbs back inside and wait for the fetus to align naturally. If delivery does not occur after a long time, the midwife should insert a hand into the vagina, manipulate the fetus to turn towards the birth canal from one side, and administer induction medicine.
The eighth is called Pian Chan (Asynclitic Presentation). This refers to the situation where the fetus has turned but is not aligned with the birth path. The mother, anxious to push, forces the fetal head to one side. Although the vertex appears, it is actually the frontal angle or ear. The mother should lie on her back. The midwife should gently correct the head's position. Administer induction medicine and instruct the mother to push; the fetus will then be born. If the occiput deviates towards the anus and the forehead faces up, the midwife should warm cotton clothes, wrap their hand, and gently support from outside the anus. Instruct the mother to push, and the fetus will be born.
The ninth is called Zuo Chan (Sitting Presentation). The mother lies on her back. The midwife gently pushes the fetus upward, presses the fetal shoulder with the middle finger to free the umbilical cord, realigns the fetal body, and instructs the mother to push; the fetus will be born.
The tenth is called Pan Chang Chan (Prolapsed Uterus Delivery). During labor, the uterus prolapses before the fetus is born. When the uterus protrudes, place it in an extremely clean, unbroken lacquerware vessel. Ancient prescriptions use 49 seeds of Bi Ma Zi (Ricini Semen), ground into a paste, applied to the mother's crown. Once the uterus retracts, wash it off immediately. For the degree of prolapse, use a small amount of water used for sharpening knives to moisten it. Then, decoct Ci Shi (Magnetitum) and drink it to retract the uterus. The Magnetitum must be one verified by Feng Shui practitioners. Ancient methods included wiping the mother's face and back with vinegar water, but this may cause fright and dispersion of qi, which is highly inadvisable. Another method involves rubbing sesame oil on the thumb, lighting a lamp, blowing it out, and using the smoke to熏 (fumigate) the mother's nose, causing the uterus to retract.
The above discussion on the Ten Types of Labor is indeed precise and comprehensive. However, it does not address the condition of non-dilation of the pubic symphysis (Jiao Gu Bu Kai). This suffices to show that medical arts are complex and difficult, inaccessible to those who are superficial or impatient.