生人之道，始于求嗣，而求嗣之法，不越乎男养精、女养血两大关键。盖阳精溢泻而不竭，阴血时下而无
愆，阴阳交畅，精血合凝，胚胎结而生育滋矣。若阳虚不能下施于阴，阴亏不能上承夫阳，阴阳抵牾，精血
乖离，是以无子。主治之法∶男当益其精而节其欲，使阳道之常健；女当养其血而平其气，使月事以时下，
交相培养，有子之道也。世人不察方，且推生克于五行，蕲补养于药饵，以伪胜真，以人夺天，虽孕而不育，
育而不寿者多矣。
求嗣之脉，专责于尺。右尺偏旺，火动好色；左尺偏旺，阴虚非福。惟沉滑匀，易为生息。微涩精清，兼
迟冷极。若见微濡，入房无力。女不好生，亦尺脉涩。
求嗣者，必先择女，犹种植者必先择地。盖砂砾之场，难期稻黍；而薄福之妇，安望熊罴？故为后嗣计，
不可不选择也。大都妇人之质，贵静而贱动，贵重而贱轻，贵浓而贱薄，贵苍而贱嫩。故唇短嘴小者不堪，
此子嗣之部位也；耳
小轮薄者不堪，此肾气之外候也；声细而不振者不堪，此丹田之气本也；形体薄弱者不堪，此藏蓄之宫城也；
饮食纤细者不堪，此仓廪血海之源也；发焦齿豁者不堪，肝亏血而肾亏精也；晴露臀削者不堪，脏不藏而后无
后也；山根唇口多青气者不堪，阳不胜阴，必多肝脾之滞逆也；脉见紧张弦涩者不堪，必真阴亏弱经候不调，
而乏生生之气也。他如未笄之女，阴气未完，欲盛之妇，所生多女。性情和者，调经自易；性情妒者，月水
不匀。相貌恶者形重，颜容美者福薄。肉肥胜骨者脂满子宫，骨瘦如柴者子宫无血。又有虎头熊项、蜂目豺
声、横面竖眉者，必多刑克；泼悍奸险、阴恶刻薄者，均不利于子嗣。求嗣者不可不急讲也。
生育的道理，始于求子，而求子的方法，离不开男子保养精气、女子调养血液这两大关键。因为男子的阳精充盈泄出而不枯竭，女子的阴血按时下行而无差错，阴阳之气交感通畅，精与血结合凝聚，胚胎形成而生育繁衍便由此产生。如果阳气虚弱不能下注于阴，阴血亏损不能上承于阳，阴阳相互抵触，精与血分离背离，因此导致无子。治疗的主旨原则是：男子应当补益精气并节制欲望，使性功能保持常态强健；女子应当调养血液并调和气机，使月经按时来潮，男女双方互相培养，这就是得子的道理。世人不明此理，反而推究五行生克关系，祈求通过药物进补，以虚假战胜真实，以人为干预自然，虽然怀孕却难以养胎，即使生下孩子也多不长寿。
求子的脉象，主要考察尺脉。右尺脉偏旺，说明相火妄动且好色；左尺脉偏旺，说明阴虚并非福兆。只有脉象沉滑且均匀，才容易孕育生机。若脉象微涩，说明精液清稀，兼见迟脉则表明体内极寒。若见到微濡之脉，说明房事无力。女子不宜生育，也表现为尺脉涩滞。
求子的人，必须先选择妻子，就像种植庄稼的人必须先选择土地一样。因为沙砾之地，很难期望长出稻黍；而福气浅薄的妇女，怎能指望生下优秀的子女？所以为后代考虑，不可不加以选择。大体上，女子的体质，以安静为贵而躁动为贱，以庄重为贵而轻浮为贱，以丰润为贵而单薄为贱，以成熟为贵而稚嫩为贱。所以嘴唇短小者不堪任用，这是判断子嗣部位的依据；耳朵小且耳轮薄者不堪任用，这是肾气外在的征候；声音细弱不振作者不堪任用，这是丹田之气的根本表现；形体瘦弱者不堪任用，这是藏蓄生殖之气的宫城薄弱；饮食量极少者不堪任用，这是化生气血的源泉匮乏；头发焦枯牙齿稀疏者不堪任用，这是肝血亏虚和肾精亏损的表现；眼睛外露臀部消瘦者不堪任用，这是脏腑不固且后继无人的表现；鼻梁根部及唇口周围多青色气者不堪任用，这是阳气不胜阴气，必然多有肝脾之气滞逆的表现；脉象呈现紧张弦涩者不堪任用，这必然是真阴亏弱、月经失调，缺乏生生不息之气。其他如未成年的少女，阴气尚未完备，性欲旺盛的妇女，所生的孩子多为女孩。性情温和者，调理月经自然容易；性情嫉妒者，月经往往不调。相貌丑陋者形体沉重，容貌美丽者福气浅薄。肉多骨少者脂肪充满子宫，骨瘦如柴者子宫无血滋养。又有头型像虎、颈项像熊、眼睛像蜂、声音像豺狼、面部横宽眉毛竖立的人，必然多有刑克不利；泼辣强悍奸险、阴险刻薄的人，都不利于子嗣。求子的人不可不急于讲究这些道理。
The way of human reproduction begins with seeking offspring, and the methods for seeking offspring do not exceed two key aspects: men nourishing their Jing (Essence) and women nourishing their Blood. When male Yang Essence is abundant and discharged without depletion, and female Yin Blood flows down at regular intervals without error, Yin and Yang interact smoothly, Essence and Blood combine and condense, leading to the formation of embryos and the proliferation of life. If Yang deficiency prevents it from descending to nourish Yin, or Yin deficiency prevents it from ascending to support Yang, Yin and Yang conflict, and Essence and Blood separate, resulting in infertility. The main therapeutic principle is: men should tonify their Essence and restrain their desires, ensuring the normal strength of sexual function; women should nourish their Blood and harmonize their Qi, ensuring menstruation occurs on time. Mutual cultivation between husband and wife is the path to having children. People in the world, failing to understand this, instead deduce interactions based on the Five Elements (Wu Xing), and seek supplementation through herbal medicines, allowing falsehood to overcome truth and human intervention to usurp nature. Consequently, although pregnancy may occur, fetal development often fails, and even if children are born, they frequently suffer from poor health and short lifespans.
Regarding the pulse for seeking offspring, primary attention is paid to the Chi (Cun Cun Kou position at the wrist). If the Right Chi pulse is excessively vigorous, it indicates hyperactive Ministerial Fire and a propensity for lust. If the Left Chi pulse is excessively vigorous, it indicates Yin deficiency, which is not auspicious. Only when the pulse is deep, slippery, and uniform is there an ease of generating new life. A faint and choppy pulse suggests clear/thin semen, while a slow pulse combined with this indicates extreme cold. If a faint and soggy pulse is seen, it indicates weakness during intercourse. For women unsuitable for childbirth, the Chi pulse is also typically choppy.
Those seeking offspring must first select a wife, just as a farmer must first select the land. Sandy and gravelly fields cannot be expected to yield rice and millet; similarly, how can one hope for excellent offspring from a woman with shallow fortune? Therefore, for the sake of descendants, selection is indispensable. Generally, a woman's constitution values stillness over agitation, dignity over frivolity, richness over thinness, and maturity over tenderness. Thus, those with short lips and small mouths are unsuitable; this relates to the anatomical location for offspring. Those with small ears and thin ear helices are unsuitable; this reflects external signs of Kidney Qi. Those with thin, weak, and unresonant voices are unsuitable; this reflects the root of Dantian Qi. Those with frail bodies are unsuitable; this reflects a weak "palace city" for storing reproductive essence. Those with very little appetite are unsuitable; this reflects a scarce source for transforming food into Blood and Qi. Those with dry hair and loose teeth are unsuitable; this indicates Liver Blood deficiency and Kidney Essence deficiency. Those with protruding eyes and sunken buttocks are unsuitable; this indicates that Zang organs fail to store essence and there will be no successors. Those with bluish discoloration around the Shan Gen (root of the nose) and lips/mouth are unsuitable; this indicates Yang failing to overcome Yin, leading to stagnation and rebellion in the Liver and Spleen. Those with tense, wiry, and choppy pulses are unsuitable; this indicates deficiency of True Yin, irregular menstruation, and a lack of vital energy. Others include unmarried girls whose Yin Qi is not yet complete, and women with excessive libido, who tend to bear daughters. Women with gentle temperaments find menstrual regulation easier; those with jealous temperaments often have irregular menstruation. Those with ugly appearances tend to have heavy bodies, while those with beautiful faces often have shallow fortune. Those with more flesh than bone have fat filling the uterus; those as thin as firewood have a uterus lacking blood. Furthermore, individuals with tiger-like heads, bear-like necks, bee-like eyes, jackal-like voices, wide faces, and vertical eyebrows often bring misfortune and conflict. Those who are泼悍 (violent and domineering), treacherous, sinister, or mean are all unfavorable for offspring. Those seeking offspring must urgently study these principles.