《病源论》云∶阴阳和调，二气相感，阳施阴化，是以有娠，而三阴所会，则多生女。
妊娠二月，名曰始脏，精成为胞裹，至于三月，名曰始胎，血不流滚，象形而变，未有定仪，
见物而化。是时，男女未分，故未满三月者，可服药方术，转之令生男也。
《产经》云∶伊芳尹曰∶盖贤母妊身当静；安居修德，不常见凶恶之事。宜弄文武兵器，
掺弓矢，射雄雉，观牡虎，走马犬，生子必为男也。
又法∶妊身三月，取杨柳东向枝三寸，系着衣带不失，子为男。
又法∶妊身三月，取五茄置床下，无令母知，子为男。
又法∶始觉有胎，服原蚕矢一枚，勿令母知之。（今按∶《千金方》∶以井花水服，日三，
必得男。）
又法∶取石南草四株着 下，勿令知之，必得男。
又法∶桑螵蛸十四枚，末，以酒服之，若无者，随多少必得。
《葛氏方》云∶觉有妊三月，溺雄鸡浴处。
又方∶密以大刀置卧席下。（《如意方》同之。）
又方∶新生男儿脐，阴干百日，烧，以酒服之。
《集验方》云∶取弓弦一枚，绛囊盛，戴妇人左臂。
《千金方》云∶取雄黄一两，绛囊盛带之∶
《录验方》治但生女无男，此大夫病，非妇人过。马齿散方∶
马齿（二分，熬） 菟丝子（一分）
凡二物，用驳马齿冶合，下筛，先食服方寸匕，日三，用井花水服之。
《枕中方》治妇人欲得转女为男法∶
有身二月中，灸脐下三壮即有男。（今按∶《产经》云∶初觉时，灸脐中。）
又方∶妊身三月求男，取夫衣带三寸烧作灰，井花水二升，东南向服，大良。
《灵奇方》云∶未满三月，取斧着妇人床下，即反成男。（今按∶《如意方》云∶试着鸡
窟下，皆雄。）
《如意方》食宜男草花即生男，一云∶妊身时带之即生男。（今案∶《本草稽疑》云∶萱
草，一名宜男草。《博物志》云∶怀妊妇人佩之即生男。字本医家加之。）
又方∶用乌鸡左翼毛二十枚，置女人 下即男。
又方∶取雄鸭翅毛二枚，着妇人卧蒋下，勿令知。
《诸病源候论》记载：阴阳调和，二气相互感应，阳气施予、阴气化育，因此受孕。而在三阴经汇聚之时受孕，则多生女孩。
妊娠两个月时，称为“始脏”，精气形成胞宫包裹胎儿；到了三个月，称为“始胎”，此时血液不再流动翻滚，随所见之物而改变形态，尚未有固定的仪容。这时，男女性别尚未分化，所以未满三个月的孕妇，可以通过服药或方术，使胎儿转为男孩。
《产经》记载：伊芳尹说：贤良的母亲在怀孕期间应当保持心境平静；安居修养德行，不常见到凶恶的事情。适宜玩弄文武兵器，拉弓射箭，射杀雄野鸡，观看公老虎，骑马跑狗，这样生下的孩子必定是男孩。
另一种方法：怀孕三个月时，取向东生长的柳树枝条三寸长，系在衣带上不要丢失，生下的孩子就是男孩。
又一种方法：怀孕三个月时，将五茄（植物名）放在床下，不要让母亲知道，生下的孩子就是男孩。
又一种方法：刚开始察觉怀孕时，服用一枚原蚕矢（即家蚕的粪便），不要让母亲知道。（按语：《千金方》记载：用井花水送服，每日三次，必定能生男孩。）
又一种方法：取四株石南草放在裙下，不要让母亲知道，必定能生男孩。
又一种方法：桑螵蛸十四枚，研成末，用酒送服，如果没有桑螵蛸，根据现有数量服用也必定有效。
《葛氏方》记载：察觉怀孕三个月后，去雄鸡洗澡过的地方小便。
又一个方子：秘密地将大刀放置在卧席之下。（《如意方》与此相同。）
又一个方子：新生男婴的脐带，阴干一百天，烧成灰，用酒送服。
《集验方》记载：取一根弓弦，用深红色的袋子盛装，戴在妇女的左臂上。
《千金方》记载：取雄黄一两，用深红色的袋子盛装并佩戴在身上。
《录验方》治疗只生女儿没有儿子的情况，这是大夫（丈夫）的病，不是妇人的过错。马齿散方：
以上两味药，用驳马的牙齿研磨混合，过筛，饭前服用一方寸匕的量，每日三次，用井花水送服。
《枕中方》治疗妇人想要转女为男的方法：
怀孕两个月时，灸脐下三壮，就会生男孩。（按语：《产经》记载：刚察觉怀孕时，灸脐中。）
又一个方子：怀孕三个月求男，取丈夫的衣带三寸烧成灰，用二升井花水，面向东南方向服用，效果很好。
《灵奇方》记载：未满三个月时，将斧头放在妇女床下，就会反转为男孩。（按语：《如意方》记载：试着放在鸡窝下，都是公鸡。）
《如意方》食用宜男草的花就会生男孩，另一说法是：怀孕期间佩戴它就会生男孩。（按语：《本草稽疑》记载：萱草，又名宜男草。《博物志》记载：怀孕妇女佩戴它就能生男孩。这个字本是医家加上去的。）
又一个方子：用乌鸡左翅膀的羽毛二十枚，放在女人裙下就会生男孩。
又一个方子：取雄鸭翅膀的羽毛二枚，放在妇女睡的蓆子下，不要让她们知道。
The *Zhubing Yuanhou Lun* (Treatise on the Pathogenesis and Symptoms of All Diseases) states: When Yin and Yang are harmonious, the two Qi (vital energies) interact; Yang exerts its influence and Yin transforms it, thus leading to pregnancy. However, conception occurring when the Three Yin meridians converge tends to result in the birth of a girl.
During the second month of pregnancy, it is termed "Beginning Zang" (formation of internal organs), where Jing (essence) forms and wraps the Bao (uterus/womb). By the third month, it is called "Beginning Fetus"; at this stage, blood no longer flows turbulently, and the form changes according to what is seen, lacking a fixed shape. At this time, male and female characteristics have not yet differentiated. Therefore, for pregnancies under three months, medicinal prescriptions or methods can be used to transform the fetus into a male.
The *Chan Jing* (Obstetrics Classic) records Yi Fangyin saying: A virtuous mother should remain calm during pregnancy; live in peace, cultivate virtue, and avoid witnessing gruesome events. It is advisable to handle civil and military weapons, draw bows and shoot arrows, hunt male pheasants, observe male tigers, and ride horses with hunting dogs; such practices ensure the birth of a son.
Another method: In the third month of pregnancy, take a willow branch growing towards the east, three cun long, and tie it to the sash without losing it; the child will be male.
Another method: In the third month of pregnancy, place Wuqia (Acanthopanax gracilistylus) under the bed without letting the mother know; the child will be male.
Another method: Upon first sensing pregnancy, ingest one piece of Yuancanshi (feces of domestic silkworms), without letting the mother know. (Note: The *Qianjin Fang* records: Take with well-water, three times daily; a male child is certain.)
Another method: Place four stalks of Shinancao (Rhododendron molle) under the skirt without letting the mother know; a male child is certain.
Another method: Take fourteen Sangpiaoxiao (Cicada Mantis Egg Case), grind into powder, and take with wine. If unavailable, use whatever quantity is available; success is assured.
The *Ge Shi Fang* records: After sensing pregnancy for three months, urinate in places where male chickens have bathed.
Another prescription: Secretly place a large knife under the sleeping mat. (The *Ruyi Fang* agrees.)
Another prescription: Take the umbilical cord of a newborn boy, dry it in the shade for one hundred days, burn it to ash, and take with wine.
The *Jiyan Fang* records: Take one bowstring, store it in a crimson bag, and wear it on the woman's left arm.
The *Qianjin Fang* records: Take one liang of Xionghuang (Realgar), store it in a crimson bag, and wear it.
The *Luyan Fang* treats cases where only daughters are born and no sons, stating this is a disorder of the husband (Daifu), not the fault of the wife. Marsilea Powder Prescription:
Machi (2 fen, stir-fried) Tusizi (1 fen) [Marsilea quadrifolia; Semen Cassiae]
These two substances are ground together using the teeth of a mottled horse, sifted, and taken before meals as one fangcunbi (a measure approx. 1 cubic inch) three times daily, taken with well-water.
The *Zhenzhong Fang* describes methods for women wishing to transform a female fetus into a male:
In the second month of pregnancy, moxa-apply three Zhuang (cones) below the navel to ensure a male birth. (Note: The *Chan Jing* records: Upon first sensing pregnancy, moxa-apply the center of the navel.)
Another prescription: To seek a male in the third month of pregnancy, take three cun of the husband's sash, burn to ash, mix with two sheng of well-water, and drink facing southeast; this is highly effective.
The *Lingqi Fang* records: Before three months, place an axe under the woman's bed to reverse the sex to male. (Note: The *Ruyi Fang* records: Placing it under a chicken coop results in roosters.)
The *Ruyi Fang* states that eating flowers of Yinancao (Daylily) leads to male birth; another view says wearing it during pregnancy ensures a male birth. (Note: The *Bencao Jiyi* records: Xuanncao is also known as Yinnancao. The *Bowuzhi* states pregnant women wearing it bear sons. This name was added by medical practitioners.)
Another prescription: Use twenty feathers from the left wing of a black chicken, place them under the woman's skirt to yield a male.
Another prescription: Take two feathers from the wings of a male duck, place them under the woman's sleeping mat without her knowledge.