巫方氏《颅囟经》云∶一月为胞胎，精血凝也。二月为胎形，始成胚也。三月阳神为三魂。四
月阴灵为
七魄。五月五形分五脏也。六月六律定六腑也。七月睛开窍，通光明也。八月元神具，降真灵也。九月宫室罗
布，以定生人也。十月受气足，万象成也。
《五脏论》有耆婆论曰∶一月如珠露；二月如桃花；三月男女分；四月形象具；五月筋骨成；六
月毛发生；七月游其魂，男能动左手；八月游其魄，儿能动右手；九月三转身；十月受气足。
孙真人曰∶凡儿在胎，一月胚，二月胎，三月有血脉，四月形体成，五月能动，六月诸骨具，七
月毛发生，八月脏腑具，九月谷入胃，十月百神备则生矣。生后六十日瞳子成，能咳笑应和人；百五十日任脉
成，能自反复；百八十日髋骨成，能独坐；二百一十日掌骨成，能扶伏；三百日髌骨成，能行也。若不能根据期
者，必有不平之处。
《巢氏病源论》曰∶妊娠一月名胎胚，足厥阴脉养之；二月名始
膏，足少阳养之；三月曰始胎，手心主脉养之。当此之时，血
不流行，形象始化，未有定仪，因感而变。欲子端正庄严，常口谈正言，身行正事；欲子美好，宜佩白玉；
欲子贤能，宜看诗书。是谓外象而内感者也。四月始成其血脉，手少阳脉养之；五月始成其气，足太阴脉养之
；六月始成其筋，足阳明脉养之；七月始成其骨，手太阴脉养之；八月始成其肤革，手阳明脉养之；九
月始成毛发，足少阴脉养之；十月五脏六腑关节人神皆备。此其大略也。
陈临川曰∶尝试推巢氏所论，云妊娠脉养之理，若足厥阴肝脉也，足少阳胆脉也，为一脏一腑，
表里之经，余皆如此。且四时之令，必始于春木，故十二经之养，始于肝胆，所以养胎在一月二月。手心主，
心胞络脉也，手少阳，三焦脉也，属火而旺夏，所以养胎在三月四月，手少阴手太阳
乃心脉也，以君主之官，无为而专也。足太阴脾脉也，足阳明胃脉也，属土而旺长夏，所以养胎
在五月六月。手太阴肺脉也，手阳明大肠脉也，属金而旺秋，所以养胎在七月八月。足少阴肾脉也，属水而
旺冬，所以养胎在九月。又况母之肾系于胎，是母之真气，子之所赖也。至十月儿于母腹
之中，受足诸脏气脉所养，然后待时而生。此论诚有至理，世更有明之者，亦未有过于巢氏之论矣。余因述其
说。
胎有男女之辨，易曰∶干道成男，坤道成女。《颅囟经》曰∶三阳所会则生男，三阴所会则生女。葛仙
翁曰∶男从父气，女从母气。《圣济经》曰∶天之德，地之气，阴阳之至和，流薄于一体，
因气而左动则属阳，阳资之则成男；因气而右动则属阴，阴资之则成女。是以胎有男女，则成有迟速，体有
阴阳，则怀有向背。故男动在三月，阳性早也。女动在五月，阴性迟也。女胎肖母而怀，
故母之腹软；男胎面母而怀，故母之腹硬。此皆得理之谈，所当察也。至若褚氏以精血之先后言
男女；《道藏经》以一日、三日、五日得者为男等说，总属臆度渺茫，非有确见也。
余不敢遵信，故别有微论，列“子嗣类”。
巫方氏在《颅囟经》中说：怀孕第一个月称为“胞胎”，是精血凝聚的结果。第二个月称为“胎形”，开始形成胚胎。第三个月，阳神化为三魂。第四个月，阴灵化为七魄。第五个月，五体分化，对应五脏的形成。第六个月，六律确定，对应六腑的形成。第七个月，眼睛睁开，窍穴开通，能够感知光明。第八个月，元神具备，真灵降临。第九个月，子宫（胞宫）结构完备，以此决定新生儿的诞生。第十个月，受气充足，万物形态皆成。
《五脏论》中引用耆婆的话说：怀孕第一个月像露珠；第二个月像桃花；第三个月男女性别区分；第四个月形象具备；第五个月筋骨形成；第六个月毛发生长；第七个月游荡的是魂，男婴能活动左手；第八个月游荡的是魄，婴儿能活动右手；第九个月身体转动三次；第十个月受气充足。
孙思邈说：大凡胎儿在母体内，第一个月为胚，第二个月为胎，第三个月有血脉，第四个月形体长成，第五个月能活动，第六个月各种骨骼具备，第七个月毛发生长，第八个月脏腑具备，第九个月母亲进食后食物入胃滋养胎儿，第十个月百神齐备就出生了。出生后六十天瞳孔成形，能咳嗽、笑并回应他人；一百五十天任脉成形，能自己翻身；一百八十天髋骨成形，能独自坐立；二百一十天掌骨成形，能伏身爬行；三百天髌骨成形，就能行走了。如果不能按照这个期限发育，必定有不平衡的地方。
《巢氏病源论》说：妊娠第一个月名叫胎胚，由足厥阴肝经滋养；第二个月名叫始膏，由足少阳胆经滋养；第三个月名叫始胎，由手厥阴心包经滋养。在这个时候，血液不流行，形象开始变化，还没有固定的仪态，因感应而发生变化。希望孩子端正庄严，常口谈正言，身行正事；希望孩子美好，宜佩戴白玉；希望孩子贤能，宜看诗书。这叫做外象而内感。第四个月开始形成血脉，由手少阳三焦经滋养；第五个月开始形成气，由足太阴脾经滋养；第六个月开始形成筋，由足阳明胃经滋养；第七个月开始形成骨，由手太阴肺经滋养；第八个月开始形成皮肤，由手阳明大肠经滋养；第九个月开始形成毛发，由足少阴肾经滋养；第十个月五脏六腑关节人神都具备。这是大概的情况。
陈临川说：我尝试推究巢元方所论述的妊娠经脉滋养的道理，如果是足厥阴肝经和足少阳胆经，是一脏一腑，表里相合的经脉，其余也都如此。而且四时的时令，必定始于春天的木气，所以十二经脉的滋养，始于肝胆，因此养胎在第一、二个月。手厥阴心包经和手少阳三焦经，属于火而旺盛于夏季，所以养胎在第三、四个月。手少阴心经和手太阳小肠经乃是心脉，因为心是君主之官，无为而专一。足太阴脾经和足阳明胃经，属于土而旺盛于长夏，所以养胎在第五、六个月。手太阴肺经和手阳明大肠经，属于金而旺盛于秋季，所以养胎在第七、八个月。足少阴肾经，属于水而旺盛于冬季，所以养胎在第九个月。况且母亲的肾脏系连于胎儿，这是母亲的真气，是胎儿所依赖的。到了第十个月，胎儿在母腹之中，接受了各脏气脉的充分滋养，然后等待时机而生。这种论述确实很有道理，世上再有阐明它的，也没有超过巢元方的论述了。我因此陈述他的学说。
胎儿有男女的区别，《易经》说：天道成就男性，地道成就女性。《颅囟经》说：三阳经气交会则生男孩，三阴经气交会则生女孩。葛仙翁说：男婴从父气，女婴从母气。《圣济经》说：天的德性，地的气机，阴阳的最高和谐，流布融合于一体，因气向左动则属阳，阳气资助则成男；因气向右动则属阴，阴气资助则成女。因此胎儿有男女之分，那么成型就有快慢，体质有阴阳之别，那么怀胎就有朝向的不同。所以男婴在第三个月动，因为阳性早发。女婴在第五个月动，因为阴性迟发。女胎像母亲那样背向母亲腹部，所以母亲的腹部柔软；男胎面向母亲腹部，所以母亲的腹部坚硬。这些都是合乎道理的言论，应当仔细考察。至于褚氏用精血到来的先后来说明男女；《道藏经》用一日、三日、五日受孕者为男等说法，总属于主观臆测，渺茫不可靠，没有确切的见解。
我不敢遵从相信这些说法，所以另有简要论述，列在“子嗣类”中。
Wu Fangshi, in the *Lunxin Jing* (Classic of the Cranium and Fontanelle), states: In the first month of pregnancy, it is called "Tai Bao" (embryonic sac), which is the coagulation of essence and blood. In the second month, it is called "Tai Xing" (fetal form), where the embryo begins to take shape. In the third month, the Yang Spirit transforms into the Three Hun (Ethereal Souls). In the fourth month, the Yin Spirit transforms into the Seven Po (Corporeal Souls). In the fifth month, the five forms differentiate, corresponding to the formation of the Five Zang Organs. In the sixth month, the six rhythms are established, corresponding to the formation of the Six Fu Organs. In the seventh month, the eyes open, orifices become patent, enabling the perception of light. In the eighth month, the Yuan Shen (Original Spirit) is complete, and the True Spirit descends. In the ninth month, the Gong Shi (uterine structure) is fully arranged, determining the birth of the newborn. In the tenth month, Qi reception is sufficient, and all phenomena/forms are completed.
The *Wangzang Lun* (Treatise on the Five Viscera) quotes Shiva (Qipo): In the first month, the fetus is like a dewdrop; in the second month, like a peach blossom; in the third month, male and female distinctions appear; in the fourth month, features are complete; in the fifth month, sinews and bones form; in the sixth month, hair grows; in the seventh month, the Hun wanders, and a male fetus can move his left hand; in the eighth month, the Po wanders, and the infant can move his right hand; in the ninth month, the body turns three times; in the tenth month, Qi reception is sufficient.
Sun Simiao said: Generally, while the fetus is in the womb, in the first month it is Pei (germ), in the second month it is Tai (embryo), in the third month blood vessels appear, in the fourth month the physical form is complete, in the fifth month it can move, in the sixth month various bones are present, in the seventh month hair grows, in the eighth month internal organs are formed, in the ninth month food enters the stomach for nourishment, and in the tenth month when Hundred Spirits are prepared, birth occurs. After birth, at sixty days, the pupils are formed, and the infant can cough, laugh, and respond to others; at one hundred fifty days, the Ren Mai (Conception Vessel) is formed, allowing self-turning; at one hundred eighty days, the hip bones are formed, allowing sitting alone; at two hundred ten days, the metacarpal bones are formed, allowing crawling; at three hundred days, the patella is formed, enabling walking. If development does not follow these timelines, there must be imbalances.
The *Chao Shi Bing Yuan Lun* (Discussion on Disease Sources by Chao Yuanfang) states: The first month of pregnancy is named Taipei (embryonic germ), nourished by the Foot Jueyin Liver Meridian; the second month is named Shigao (beginning fat/marrow), nourished by the Foot Shaoyang Gallbladder Meridian; the third month is named Shitai (initial fetus), nourished by the Hand Jueyin Pericardium Meridian. At this time, blood does not flow freely, the image begins to transform, without fixed posture, changing due to influences. To desire the child to be upright and solemn, one should speak righteous words and perform righteous deeds; to desire beauty, one should wear white jade; to desire virtue and ability, one should read poetry and books. This is called external images affecting internal sensations. In the fourth month, blood vessels begin to form, nourished by the Hand Shaoyang Sanjiao Meridian; in the fifth month, Qi begins to form, nourished by the Foot Taiyin Spleen Meridian; in the sixth month, sinews begin to form, nourished by the Foot Yangming Stomach Meridian; in the seventh month, bones begin to form, nourished by the Hand Taiyin Lung Meridian; in the eighth month, skin begins to form, nourished by the Hand Yangming Large Intestine Meridian; in the ninth month, hair begins to form, nourished by the Foot Shaoyin Kidney Meridian; in the tenth month, the Five Zang and Six Fu Organs, joints, and human spirits are all complete. This is the general outline.
Chen Linchuan said: I have attempted to deduce the principle of meridian nourishment during pregnancy as discussed by Chao Yuanfang. For instance, the Foot Jueyin Liver Meridian and Foot Shaoyang Gallbladder Meridian constitute a Zang-Fu pair and interior-exterior relationship, and so do the others. Since the seasons begin with Spring Wood, the nourishment of the twelve meridians begins with the Liver and Gallbladder, hence nourishing the fetus in the first and second months. The Hand Jueyin Pericardium Meridian and Hand Shaoyang Sanjiao Meridian belong to Fire and flourish in Summer, hence nourishing the fetus in the third and fourth months. The Hand Shaoyin Heart Meridian and Hand Taiyang Small Intestine Meridian are the Heart meridians; since the Heart is the Sovereign Officer, it acts through non-action and unity. The Foot Taiyin Spleen Meridian and Foot Yangming Stomach Meridian belong to Earth and flourish in Late Summer, hence nourishing the fetus in the fifth and sixth months. The Hand Taiyin Lung Meridian and Hand Yangming Large Intestine Meridian belong to Metal and flourish in Autumn, hence nourishing the fetus in the seventh and eighth months. The Foot Shaoyin Kidney Meridian belongs to Water and flourishes in Winter, hence nourishing the fetus in the ninth month. Moreover, the mother's Kidneys are connected to the fetus; this is the mother's True Qi, upon which the child relies. By the tenth month, the fetus in the womb has received sufficient nourishment from the Qi and pulses of all viscera, then waits for the proper time to be born. This theory possesses profound truth; no subsequent exposition has surpassed Chao Yuanfang's discussion. I therefore recount his teachings.
There is a distinction between male and female fetuses. The *I Ching* (Book of Changes) states: The Way of Heaven creates males, the Way of Earth creates females. The *Lunxin Jing* says: Convergence of Three Yang meridians produces a male; convergence of Three Yin meridians produces a female. Ge Xianweng said: Males derive from paternal Qi, females from maternal Qi. The *Shengji Jing* (Holy Relief Classic) states: The Virtue of Heaven and the Qi of Earth, the supreme harmony of Yin and Yang, flow and blend into one body. If movement due to Qi is to the left, it belongs to Yang; supported by Yang, it becomes male. If movement is to the right, it belongs to Yin; supported by Yin, it becomes female. Therefore, regarding male and female fetuses, formation has speed differences; regarding Yin-Yang constitutions, gestation has directional orientations. Thus, male fetuses move in the third month because Yang energy is early; female fetuses move in the fifth month because Yin energy is late. Female fetuses face away from the mother's abdomen (resembling the mother's back), so the mother's abdomen feels soft; male fetuses face the mother's abdomen, so the mother's abdomen feels hard. These are rational discussions that should be observed. As for Chu Shi's explanation of gender based on the sequence of essence and blood arrival, or the *Daozang Jing*'s claim that conception on the first, third, or fifth day yields a male, these are all speculative and vague, lacking definitive evidence.
I dare not blindly believe these accounts, thus offering my brief treatise separately, listed under the "Offspring Lineage Category".