种子之法，古人言之不少∶如广嗣诀以经期方止，子宫正开，宜及时布种。道藏经以月信止后，单日属阳
成男，偶日属阴成女。李东垣以经断一二日感者成男，四五日感者成女。朱丹溪以受气于左子宫为男，受气于
右子宫为女。圣济经以左动成男，右动成女。褚氏遗书以血裹精成男，精裹血成女。诸说纷纷，各成其是，而
终无十全之效。所谓效获十全者，寡欲是也。寡欲则不妄交合，聚精会神，待时而动，亦何求而不得欤然。寡
欲必先清心，心主血而藏神，心有所动，神即外驰，外虽未泄，精已离宫，即肾气亦随之而内
乱。轻则梦遗淋浊，重则杨梅结毒，即幸而获免其于交会之际，毫无静一清宁之真气，所泄之物，尽是腐浊而
已，安能化育成胎哉。心为一身之主，诚能扫尽邪思，兼用静工存养，无令火动，俟阳精充实，根据时而合，一举
而成。是以寡欲则神完，不惟多子，抑亦多寿。
夫精成于血，不独房劳损吾之精，凡日用事物之间，其伤吾精者甚多，如目劳于视，则血以视耗；耳劳于
听，则血以听耗；心劳于思，则血以思耗。吾随事而节之，则血得其养而与日俱积矣。
肾主闭藏，肝主疏泄，二脏皆有相火，而其系上属于心，心君火也。怒则伤肝而相火动，动则疏泄者，
用事而闭藏者，不得其职，虽不交合，亦暗流而潜耗矣。
关于受孕的方法，古人论述不少：如《广嗣诀》认为在月经刚停止时，子宫正开放，适宜及时行房播种。《道藏经》认为月经停止后，单日属阳可生男孩，偶日属阴可生女孩。李东垣认为月经结束一两天内受孕生男孩，四五天受孕生女孩。朱丹溪认为精子进入左子宫受孕为男，进入右子宫受孕为女。《圣济经》认为左侧胎动生男孩，右侧胎动生女孩。《褚氏遗书》认为血包裹精液生男孩，精液包裹血液生女孩。这些说法纷纭各异，各自有其道理，但最终都没有百分之百的效验。所谓能获十全之效的方法，就是寡欲（节制性欲）。寡欲就不会随意交合，能够聚精会神，等待合适的时机行动，还有什么求不到的呢？然而，寡欲必须先清心（使心境清净），因为心主血脉而藏神，心有所动，神就会向外驰散，虽然外表没有射精，但精气已经离开子宫，肾气也随之内部紊乱。轻则出现梦遗、淋证或浊证，重则导致杨梅结毒（梅毒等性传播疾病引起的硬结毒性病症）。即使侥幸避免了上述病症，但在交合之际，毫无宁静清和的真气，所射出的物质全是腐败浑浊之物，怎么能化育形成胚胎呢？心是身体的主宰，如果能扫除所有邪念，兼用静坐功夫来存养心神，不让相火妄动，等到阳精充实，根据时机结合，就能一举成功。所以寡欲能使精神完备，不仅多子，而且长寿。
精由血生成，不只是房事劳累损伤我的精气，凡是在日常事务中，损伤我精气的情况很多，如眼睛因视物过度劳累，则血液因视物而消耗；耳朵因听音过度劳累，则血液因听音而消耗；心因思虑过度劳累，则血液因思虑而消耗。我随着事情的发生加以节制，那么血液就能得到滋养并与日俱增了。
肾主闭藏，肝主疏泄，这两脏都有相火（寄居于肝肾之火），且它们的联系上属于心，心君火也。发怒会伤肝而导致相火妄动，一旦妄动，负责疏泄的功能就占据主导，而负责闭藏的功能就不能履行职责，即使不进行交合，精气也会暗中流失而潜耗。
Regarding the method of conception, there are numerous discussions by ancient scholars: For instance, *Guangsi Jue* (Prescriptions for Prolonging Lineage) suggests that when menstruation has just ceased and the uterus is open, it is appropriate to engage in intercourse promptly to sow the seed. The *Daozang Jing* (Scriptures of the Daoist Canon) states that after menstruation stops, odd days belong to Yang and result in male offspring, while even days belong to Yin and result in female offspring. Li Dongyuan believed that conception within one or two days after menstruation ends results in a boy, while conception four or five days later results in a girl. Zhu Danxi held that if fertilization occurs in the left uterus, it produces a male, and if in the right uterus, a female. *Shengji Jing* (Holy Relief Scripture) claimed that fetal movement on the left side indicates a male, and on the right side, a female. *Chushi Yishu* (Remnant Book of Master Chu) argued that blood wrapping the essence produces a male, while essence wrapping the blood produces a female. These theories vary widely, each claiming validity, yet none achieve perfect efficacy. The method said to yield perfect results is "reducing desires" (abstaining from excessive sexual activity). Reducing desires prevents reckless intercourse, allowing one to gather essence and spirit, acting only at the proper time; thus, what could be unattainable? However, reducing desires must begin with clearing the mind (purifying mental state), as the Heart governs blood and houses the Shen (Spirit). If the Heart is stirred, the Shen scatters outward. Although ejaculation may not occur externally, the essence has already left the uterus, and Kidney Qi becomes internally chaotic. Mild cases manifest as nocturnal emission, stranguria, or turbid discharge; severe cases lead to yangmei jiedu (hard chancres/toxicities associated with sexually transmitted diseases like syphilis). Even if these are fortunately avoided, during intercourse, lacking the true Qi of tranquility and purity, the expelled material is merely corrupt and turbid. How can such matter transform and nurture an embryo? The Heart is the master of the body. If one can sweep away evil thoughts and employ quiet sitting practices to nourish the spirit, preventing ministerial fire from stirring, waiting until yang essence is abundant before uniting according to timing, success will be achieved in one attempt. Thus, reducing desires ensures spiritual completeness, leading not only to many children but also to longevity.
Essence is formed from blood. It is not only sexual fatigue that damages our essence; in daily affairs, many things damage our essence. For example, visual overexertion consumes blood through seeing; auditory overexertion consumes blood through hearing; mental overexertion consumes blood through thinking. By regulating ourselves according to these activities, blood receives nourishment and accumulates day by day.
The Kidney governs closure and storage, while the Liver governs dispersion and excretion. Both organs contain ministerial fire (Ministerial Fire residing in the Liver and Kidney), and their connections extend upward to the Heart, which governs sovereign fire (Heart Fire). Anger injures the Liver and stirs ministerial fire. Once stirred, the function of dispersion takes precedence, and the function of closure fails in its duty. Even without intercourse, essence flows secretly and dissipates covertly.