盖医之一道，为司命之司，原非容易，但能存心济人，博考群书，临症体察，以人性命为重，
虽未能有圣贤之学，而虚实寒热、表里阴阳辨释明白，用药得当，自不致于误人。而产科一症，尤
宜谨慎守法。略一错误，则胎不保，甚至产母亦伤，能无怨乎？至于产后，总属气血空虚，丹溪先
生云∶虽有他症，以末治之。此诚千古格言，自当遵前贤制方选用，断不可以杜撰误人。如无忧
散、佛手散、生化汤之类，千古不磨，毋庸苟且。每见今人，医产全不合法，一味杜撰好奇，名为生
化，实非生化之意。设遇体浓者，侥幸得愈。体薄者，祸必立至。至于产后汗出，须防元阳外越；
泄泻，即防中气下脱；喘急，更防恶露上逆。此皆产后极忌之处。而产后发热，常有之也。缘下
元空虚，阴虚生内热，只须四物汤加童便，热即退也。间有瘀血不行者，有经风者，有停滞者，有
蒸乳者，各审其因而药之。风感者用归芎，补血之中加黑荆芥一味足矣。盖产时体虚，百节开张，
腠理不固，易入易出，若表其汗，则元阳外越，未有不死者也。其停滞者，只于理脾之药加谷芽、
陈皮可矣。盖脾虚则不运化，宜用阳药以助脾温胃，即运化矣。须知产后有邪，总宜补中兼消，
未有消而不补之理。有等初学无传之辈，放胆竟用柴、芩、羌、防、山楂、神曲之剂，以治伤寒之
病，忘却产后之身，至轻者变重，重者即死，误人不浅，真可畏怕也。况中风症乃血虚者多，《内
经》谓治风先治血，血行风自灭。张景岳先生师其意，发有非风之论，此皆医平人而言，尚谨慎如
此，而况产后肝血空虚，虚生内风，更可知矣。夫天地有好生之德，吾侪宁不慎重于斯，而以人性
命为儿戏哉？予每见而怜焉。因《产科心法》纂选成书，此吾数十年来用之效验，悟于心而应于
手，且简而不繁。俾产家观之为准绳，则性命得以安痊。医家一有准绳，则举手无错误矣。噫！
圆通之士，始可与言斯道耶。
乾隆四十五年岁次庚子仲春月休宁朴斋汪 纂并序
医学这一门学问，是掌管人生命运的关键，原本就不是一件容易的事。只要心存济世救人之心，广泛考证各类医书，临证时细致观察，以人的性命为最重，虽然未必能达到圣贤的学问境界，但只要能将虚实、寒热、表里、阴阳辨别解释得清楚明白，用药得当，自然就不会误人。而产科这一病症，尤其应当谨慎并遵守法度。稍微有一点错误，就会导致胎儿不保，甚至伤害产母，这能不让人怨恨吗？至于产后阶段，总体属于气血空虚的状态。丹溪先生曾说：“即使有其他病症，也要把它们当作次要问题来处理。”这确实是千古不变的格言，应当遵循前贤制定的方剂进行选用，绝对不可以凭空杜撰来误导他人。像无忧散、佛手散、生化汤这类方子，历经千年而不磨灭，不容许马虎对待。我常看到现今的一些医生，治疗产妇完全不符合规范，一味地杜撰新奇药方，名义上叫“生化”，实际上并不符合“生化”的本意。如果遇到体质壮实的产妇，侥幸得以痊愈；但如果遇到体质瘦弱的产妇，灾祸必定立刻降临。至于产后出汗，必须防止元阳外越；出现泄泻，就要防止中气下脱；出现喘急，更要防止恶露上逆。这些都是产后极其忌讳的情况。而产后发热，则是经常发生的现象。这是因为下元空虚，阴虚产生内热，只需要用四物汤加入童便（童子尿），热症就会消退。间或有瘀血不行的，有感受风邪的，有饮食停滞的，有乳汁郁蒸的，分别审察其原因然后用药。如果是感受风邪的，使用当归、川芎，在补血之中加入一味黑荆芥就足够了。因为生产时身体虚弱，全身关节开张，腠理（皮肤毛孔）不坚固，病邪容易侵入也容易外出，如果强行发汗解表，就会导致元阳外越，没有不死人的。如果是饮食停滞的，只在理脾的药物中加入谷芽、陈皮就可以了。因为脾虚则不能运化，宜用温阳药物以助脾温胃，这样就能恢复运化了。必须知道产后如果有邪气，总宜在补益的同时兼以消导，没有只消导而不补益的道理。有一类初学且无师承的人，大胆竟然使用柴胡、黄芩、羌活、防风、山楂、神曲等药物治疗伤寒病，忘记了患者是产后之身，导致轻症变重，重症即死，误人不浅，真是令人畏惧害怕啊。况且中风症多是血虚引起的，《内经》说治风先治血，血行风自灭。张景岳先生领会了这一意思，提出了“非风”的理论，这都是针对普通人而言，尚且如此谨慎，更何况产后肝血空虚，虚而生内风，就更可以知道了。天地有好生之德，我们这些人难道不应当对此慎重，而把人的性命当作儿戏吗？我每次见到这种情况都感到怜悯。因此编纂《产科心法》成书，这是我几十年来使用的有效经验，心中领悟而手上应用，而且简明不繁琐。使产妇家属观看此书作为准则，那么性命就能得到安宁痊愈。医生一旦有了准则，那么举手投足之间就不会有错误了。唉！只有圆通通达的人，才可以和他谈论这门学问啊。
乾隆四十五年岁次庚子仲春月，休宁朴斋汪氏纂集并作序。
The practice of medicine is a profession that holds the power over life and death, and it is by no means an easy task. As long as one harbors a compassionate heart to save others, extensively studies various medical texts, carefully observes patients during clinical practice, and prioritizes human life above all else, even if one has not attained the scholarly level of sages, as long as one can clearly distinguish and explain deficiency and excess, cold and heat, exterior and interior, and yin and yang, and prescribe medications appropriately, one will naturally avoid harming patients. However, in obstetrics, one must be especially cautious and strictly adhere to established principles. A slight error may result in the loss of the fetus and even injury to the mother, which would inevitably lead to resentment? Regarding the postpartum period, the body is generally characterized by a deficiency of qi and blood. Mr. Danxi stated: "Even if other symptoms are present, they should be treated as secondary." This is indeed an eternal maxim; one should follow the prescriptions formulated by former sages and select them appropriately, absolutely avoiding fabrication that could mislead people. Formulas such as Wuyou San (Worry-Free Powder), Foshou San (Buddha's Hand Powder), and Shenghua Tang (Life-Generating Decoction) have stood the test of time for millennia and should not be treated with negligence. I often observe that contemporary physicians treat postpartum conditions entirely contrary to proper methods, blindly fabricating novel prescriptions under the name of "Shenghua," yet lacking the true intent of "generating life." If applied to women with robust constitutions, recovery might occur by chance; but for those with frail constitutions, disaster will strike immediately. Regarding postpartum sweating, one must guard against the escape of primordial yang; regarding diarrhea, one must guard against the sinking of middle qi; regarding panting and urgency, one must guard against the upward reversal of lochia. These are all extreme taboos in the postpartum state. Postpartum fever, however, is a common occurrence. It arises because the lower yuan is empty, leading to internal heat due to yin deficiency. Simply using Siwu Tang (Four Substances Decoction) added with Tongbian (Child's Urine) will resolve the fever. Occasionally, there are cases of stagnant blood, wind invasion, food stagnation, or milk stasis; each must be diagnosed according to its cause and treated accordingly. For wind invasion, use Danggui (Angelica Sinensis) and Chuanxiong (Ligusticum Chuanxiong); adding Hei Jingjie (Black Schizonepeta) to the blood-nourishing formula is sufficient. During childbirth, the body is weak, joints are open, and couli (pores/interstices) are insecure, making it easy for pathogens to enter and exit. If one forcibly induces sweating to release the exterior, primordial yang will escape, resulting in certain death. For food stagnation, simply add Guya (Sprouted Grain) and Chenpi (Aged Tangerine Peel) to spleen-regulating herbs. Since spleen deficiency leads to impaired transformation and transportation, warming yang herbs should be used to assist the spleen and warm the stomach, thereby restoring function. One must understand that when pathogenic factors exist postpartum, treatment should always combine tonification with elimination; there is no rationale for eliminating without tonifying. Some untrained novices without proper transmission boldly use formulas containing Chaihu (Bupleurum), Huangqin (Scutellaria), Qianghuo (Notopterygium), Fangfeng (Saposhnikovia), Shanzha (Hawthorn), and Shenqu (Medicated Leaven) to treat Shanghan (Cold Damage diseases), forgetting the postpartum condition. This causes mild cases to become severe and severe cases to result in death, causing significant harm, which is truly terrifying. Moreover, Zhongfeng (Wind Stroke) is mostly caused by blood deficiency. The Neijing states: "To treat wind, first treat the blood; when blood flows, wind extinguishes itself." Mr. Zhang Jingyue understood this principle and proposed the theory of "Non-Wind" (Feifeng). These discussions apply to healthy adults, who still require such caution; how much more so for postpartum women whose liver blood is empty and who generate internal wind from deficiency? Heaven and Earth possess the virtue of loving life; should we not be prudent in this regard rather than treating human life as a trivial matter? I feel pity every time I witness such situations. Therefore, I compiled the *Obstetric Core Methods* into a book. These are effective experiences accumulated over decades, understood in the mind and applied by the hand, concise yet comprehensive. Letting families of parturients use it as a standard ensures the safety and recovery of lives. Once physicians have a standard, their actions will be free from error. Alas! Only those with wisdom and flexibility can discuss this path.
Compiled and prefaced by Wang of Xiuning Puzhai in the second month of Gengzi year, 45th year of Qianlong reign.