妇人有孕三五月之间，令人摸之，上小下大，形如箕者为女。以女胎面向母腹，其足膝抵母腹故也。中正
圆高，形如釜者为男。以男胎面向母背，其背脊抵母腹也。又妊妇左乳房有核为男，右乳房有核为女。又男动
在三月，阳性早也，女动在五月，阴性迟也。是胎气钟于阳则生男，钟于阴则生女也。
命妊妇前行，夫从后急呼之，左回首者是男，右回首者是女。盖男胎在左则左重，故回首时，慎护重处而
就左也。如胎在右则右重，故回首时，慎护重处而就右也。推之，于脉亦然。胎在左，则血气护胎而盛于左，
故脉亦从之而左。疾为男左大，为男也。胎在右，则血气护胎而盛于右，故脉亦从之而右。疾为女右大，为女
也，此阴阳自然之理也。
《易》曰∶干道成男，坤道成女，此定理也。男子平时清心寡欲，养其干健之体，则得其所感而生男。又
积德以正心，更能戒杀，则冥冥之中，自有报应，孕必生男，且俊且寿，故天之生物，必因其材而笃焉。此生
男神效法也。至于受胎时日之法谓，经尽一二日感者成男，三四五日感者成女，似
为近理终不足凭。即今方家备载转女为男之法，用之或验或不验，未可深信。然物易得而用在外，亦有益而无
损，姑录数法于后。附法∶妇人始觉有孕，以斧置妇床下，系刃向下，勿令知之，若不信待鸡抱卵时，以斧悬
窠下，则一窠尽是雄鸡。又法∶受孕之后，用弓弦一条系缚妇人腰中，满百日去之。又法∶受妊三月以前，用
雄鸡尾尖上长毛三茎，潜安妇人卧床下，勿令知之。又法∶始知有孕，用明雄黄三两，绛囊盛，佩带妇左腰间
即生男，以雌黄佩之即生女。
孕妇在怀孕三到五个月期间，让人触摸腹部，如果上部小下部大，形状像簸箕的是女胎。这是因为女胎面向母亲的腹部，其足膝抵住母腹的缘故。如果腹部中正、圆润且高隆，形状像锅的是男胎。这是因为男胎面向母亲的背部，其脊背抵住母腹的缘故。另外，如果孕妇左侧乳房有硬结则是男胎，右侧乳房有硬结则是女胎。此外，男胎在怀孕三个月时开始胎动，因为阳气发动较早；女胎在怀孕五个月时开始胎动，因为阴气发动较迟。这就是胎气汇聚于阳则生男，汇聚于阴则生女的道理。
让孕妇向前行走，丈夫从后面突然呼唤她，向左回头的是男胎，向右回头的是女胎。大概是因为男胎位于左侧，所以左侧较重，因此回头时会小心保护重的一侧而转向左边。如果胎位位于右侧，则右侧较重，因此回头时会小心保护重的一侧而转向右边。推究起来，脉象也是如此。胎位在左，则血气护佑胎儿而在左侧旺盛，所以脉象也随之在左侧显现有力。疾速诊察时，左侧脉大则为男胎。胎位在右，则血气护佑胎儿而在右侧旺盛，所以脉象也随之在右侧显现有力。疾速诊察时，右侧脉大则为女胎，这是阴阳自然的规律。
《易经》说：乾道成就男性，坤道成就女性，这是确定的定理。男子平时清心寡欲，保养刚健的体质，那么受孕后就会生下男孩。又积累德行以端正内心，更能戒除杀生，那么在冥冥之中自有报应，怀孕必定生男，而且孩子英俊长寿，所以上天化生万物，一定是根据其材质而厚待它。这是生育男神效法的道理。至于受胎时日的方法说，月经结束后一两天受孕的成男，三四五天受孕的成女，似乎近于情理但最终不足以信赖。即使现在医家详细记载了转女为男的方法，使用它们有时灵验有时不灵验，不可深信。然而物品容易得到且用法在外，也是有益无害，姑且记录几种方法在后面。附法：妇人刚开始觉得有孕，把斧头放在床下，刃口向下，不要让她知道。如果不信，等到鸡孵卵的时候，把斧头悬挂在巢下，那么一窝全是雄鸡。又一种方法：受孕之后，用一根弓弦系缚在妇人腰间，满一百天后去掉。又一种方法：怀孕三个月以前，用雄鸡尾尖上长出的三根长毛，悄悄安放在妇人的卧床下，不要让她知道。又一种方法：刚开始知道有孕，用明雄黄三两，用红色袋子盛装，佩戴在妇人左侧腰间即生男孩，如果用雌黄佩戴则生女孩。
During the third to fifth month of pregnancy, if palpation reveals that the upper part is smaller and the lower part is larger, with a shape resembling a winnowing basket, it indicates a female fetus. This is because the female fetus faces the mother's abdomen, with its feet and knees pressing against the maternal abdominal wall. If the abdomen is central, round, and high, with a shape resembling a cauldron, it indicates a male fetus. This is because the male fetus faces the mother's back, with its spine pressing against the maternal abdominal wall. Furthermore, if there is a nodule in the pregnant woman's left breast, it indicates a male fetus; if in the right breast, it indicates a female fetus. Additionally, fetal movement for males begins at three months due to the early activation of Yang Qi (vital energy associated with activity and heat); for females, it begins at five months due to the delayed activation of Yin Qi (vital energy associated with structure and coolness). Thus, when fetal Qi concentrates on Yang, a male is born; when it concentrates on Yin, a female is born.
Instruct the pregnant woman to walk forward while her husband calls out to her suddenly from behind. If she turns her head to the left, it is a male fetus; if to the right, it is a female fetus. This is likely because the male fetus is located on the left, making the left side heavier; thus, when turning her head, she instinctively protects the heavier side by leaning left. If the fetus is on the right, the right side is heavier, so she leans right to protect it. By analogy, this applies to pulse diagnosis as well. When the fetus is on the left, Blood and Qi (vital substances) nurture the fetus and become abundant on the left, so the pulse also reflects strength on the left. A rapid examination showing a larger pulse on the left indicates a male fetus. When the fetus is on the right, Blood and Qi become abundant on the right, so the pulse reflects strength on the right. A rapid examination showing a larger pulse on the right indicates a female fetus. This follows the natural principle of Yin and Yang.
The *I Ching* (Book of Changes) states: "The Way of Qian creates men, the Way of Kun creates women," which is a fixed principle. Men who maintain a clear mind and few desires, nurturing their robust constitution, will conceive and give birth to sons. By accumulating virtue to rectify the heart and abstaining from killing, one receives karmic retribution in the unseen realm; pregnancy will surely result in a son who is handsome and long-lived. Thus, Heaven generates all things according to their nature and endows them accordingly. This is the method for emulating the generation of male offspring. Regarding the timing of conception, some claim that conception within one or two days after menstruation ends results in a male, while conception on days three to five results in a female. Although this seems plausible, it is ultimately unreliable. Even though contemporary physicians record methods to transform a female fetus into a male, their efficacy varies, and they cannot be deeply trusted. However, since the materials are easy to obtain and the methods are external, they do no harm and may offer benefits. Therefore, several methods are recorded below. Supplementary Method 1: When a woman first suspects pregnancy, place an axe under her bed with the blade facing down, without letting her know. If skeptical, wait until hens are brooding eggs, then hang the axe under the nest; the entire clutch will hatch as roosters. Supplementary Method 2: After conception, tie a bowstring around the woman's waist and remove it after one hundred days. Supplementary Method 3: Before the third month of pregnancy, secretly place three long tail feathers from a rooster under the woman's bed without her knowledge. Supplementary Method 4: Upon confirming pregnancy, take three taels of realgar (Xionghuang), store it in a crimson pouch, and wear it on the woman's left waist to ensure a male birth; wearing Orpiment (Yinhuang) ensures a female birth.