方苞方萼生气未舒，甫童甫笄天癸未裕，曾见有未实之粒可为种，未足之蚕可为茧乎？强费心力即日姑俟
异日，而年衰者其能待乎，是坐失其时而已矣。
男女交合，古法当避丙丁日及弦晦望日。然为艰嗣者计似可不拘。若大风大雨大雷大雾，产寒酷暑以及
天地晦冥，日月薄蚀，虹霓地震之际，此天地之震怒四时不正之气，犯则损男百倍，令女得病。纵然有子，亦
必癫痴顽愚、喑哑聋 ，挛跛盲眇，多病短寿，不孝不仁，此其宜避忌者一也。又日月星光之下，神庙侍寺
之中，井灶圊厕之侧，冢墓尸柩
之傍，以及沉阴危险之地，皆不可犯，此其宜避忌者又一也。夫交合知避，则有福德大智善人降宅胎中，仍
令性行和顺，家道日隆，非惟少疾，亦必聪明俊秀而多寿。若不避忌，则愚痴奸诡恶人来宅胎中，仍令性行凶
险，家道日消，非惟生理残障，亦必飞灾横祸而夭枉，祸福之应验，如影响可不慎欤。
胎元初成，形如珠露，此其橐龠无根据，根 无地，巩之则固，决之则流。故凡受胎之后，极宜节欲，以
防泛溢。而少年纵情，罔知忌惮，往往恃强而不败，或既败而复战。当此之时，主方欲静，客不肯休，无奈狂
徒敲门撞户，顾彼水性热肠，有不启扉而从，随流而逝者乎。斯时也，落花与粉蝶齐飞，火枣共交梨并逸合污
同流已，莫知其昨日孕而今日堕矣，朔日孕而望日堕矣，随孕随堕本无形迹。盖明产胎已成形小产必觉，而暗
成胎仍似水直溜，何知？故HT 术家多无大产，以小产之多也。娶娼妓者多无子息，以其子宫滑而惯于小产也。
余尝见世之艰嗣者，问其阳事，则曰能战；问其功夫则曰尽通；问其意况，则怨叹曰∶人皆有子我独无夫！
岂知人之明产而己之暗产耶。此外，如受胎三五七月而每有堕者，虽衰弱之妇多有之，然必由纵欲不节，致伤
母气而堕者为尤多也。故凡恃强过勇者多无子，以强弱之自相残也；纵肆不节者多不育，以盗损胎元之气也，
岂悉由妇人之罪哉。求嗣者思患而预防之，则庶乎其可矣。
孩子如同花苞和花萼，生机尚未舒展；刚成童男童女，天癸（指女子月经来潮或男子精气溢泻的生理现象）尚未充盈。曾见过未成熟的种子能作为良种、未长足的蚕能结茧吗？勉强耗费心力说暂且等待异日，但年岁渐衰的人还能等到那时吗？这不过是白白错失良机罢了。
男女交合，古法应当避开丙丁日（天干中的火日）以及弦日（初七、初八）、晦日（每月最后一天）、望日（十五）。然而对于难以受孕者来说，似乎可以不必拘泥于此。若是遇到大风大雨、大雷大雾，极寒酷暑，天地昏暗，日月食，虹霓显现、地震等时刻，这些都是天地震怒、四时不正之气发作之时，触犯这些禁忌会严重损害男方百倍，并使女方患病。即使有了孩子，也必定癫狂痴呆、愚笨、哑巴聋子、肢体挛缩跛行、盲眼眇视，多病短寿，不孝不仁，这是应当避忌的第一点。另外，在日月星光之下，神庙寺庙之中，井灶厕所旁边，坟墓棺木之侧，以及阴暗危险之地，都不可行房，这是应当避忌的第二点。如果交合时懂得避忌，那么有福有德、大智大慧的善人就会降临宅第投胎，使孩子性情和顺，家道日益兴隆，不仅少生病，而且必定聪明俊秀且长寿。如果不避忌，那么愚痴奸诈的恶人就会进入宅第投胎，使孩子性情凶险，家道日益衰落，不仅有生理残障，还会遭遇飞来横祸而夭折。祸福的应验，就像回声和影子一样迅速，怎能不谨慎呢？
胎元刚刚形成，形状像露珠一样，此时胎气没有依托，根基不稳，巩固它则稳固，决口它则流失。所以凡是受孕之后，极宜节制性欲，以防止胎气泛溢流失。而少年放纵情欲，不知忌惮，往往自恃身体强壮而不败，或者已经泄精后又再战。在这个时候，女方本想安静休息，男方不肯停止，无奈像狂徒敲门撞户一样，看着那如水般热情的心肠，难道有不打开门扉顺从、随波逐流的情况吗？这个时候，落花与粉蝶齐飞，火枣与交梨并逸，污浊同流，没有人知道昨天怀孕今天就流产了，初一怀孕十五就流产了。这种随孕随堕的现象本来没有明显痕迹。因为明显的生产（足月分娩）胎儿已成形，小产（流产）一定能感觉到，而暗产（隐性流产）的胎儿仍像水一样直接溜走，怎么知道呢？所以从事接生术的稳婆大多没有大的生产经历，因为小产太多了。娶妓女的人大多没有子嗣，因为她们子宫滑利且习惯于小产。我曾见过世上难以受孕的人，问他们的性功能，回答说能战斗；问他们的技巧，回答说精通；问他们的心境，却抱怨叹息说：“别人都有孩子我唯独没有丈夫！”哪里知道这是别人的明产和自己的暗产呢？此外，如受孕后在三、五、七月经常流产的，虽然是虚弱的妇女多有发生，但必然由纵欲不节，导致损伤母气而流产的情况更多。所以那些自恃强壮过度勇猛的人大多没有子嗣，因为强弱相互残害；放纵不节制的人大多不育，因为盗损了胎元的元气，这难道全是妇人的罪过吗？求子的人思考祸患并加以预防，那么大概就可以成功了。
The child is like a flower bud and calyx, with vitality not yet fully unfolded; just becoming a boy or girl, the Tian Gui (physiological phenomenon referring to menstruation in women or seminal emission in men) has not yet become abundant. Have you ever seen an immature seed serving as good stock, or an underdeveloped silkworm spinning a cocoon? To forcibly expend effort saying "let us wait for another day," but can those whose years are declining wait that long? This is merely sitting idle and losing the opportunity.
When men and women engage in intercourse, ancient methods dictate avoiding Bing-Ding days (Fire days in the Heavenly Stems), as well as the days of the first quarter (Chuxi/Qiba), last day of the month (Hui), and full moon (Wang). However, for those struggling with infertility, it seems one need not be strictly bound by these rules. But if encountering strong winds, heavy rain, thunder, fog, extreme cold or heat, dark skies, solar or lunar eclipses, rainbows, or earthquakes—these are times when Heaven and Earth rage and the Qi of the four seasons is irregular. Violating these causes harm to the male a hundredfold and causes disease in the female. Even if a child is conceived, they will likely be manic, foolish, stupid, mute, deaf, contracted, lame, blind, or squint-eyed, prone to illness and short-lived, unfilial and unkind. This is the first category of things to avoid. Furthermore, under the light of the sun, moon, or stars; within temples or shrines; beside wells, stoves, or latrines; near tombs or coffins; and in places that are deeply yin or dangerous—intercourse should not take place. This is the second category of things to avoid. If one knows to avoid these during intercourse, then virtuous, blessed, wise, and good spirits will descend into the home to conceive, resulting in children with gentle and compliant natures, leading to a flourishing family lineage. They will suffer fewer illnesses and be smart, handsome, and long-lived. If one does not avoid these, then foolish, deceitful, and evil spirits will enter the home to conceive, resulting in children with violent natures, leading to a declining family. They will have physical disabilities and suffer sudden disasters, dying prematurely. The verification of fortune and misfortune is as immediate as an echo or shadow; how can one not be cautious?
When the fetal origin (Tai Yuan) is first formed, it resembles a drop of dew. At this stage, its Qi bag (Tuoyue) lacks foundation, and its root lacks ground. Consolidating it makes it firm; rupturing it causes flow. Therefore, after conception, one must strictly restrain sexual desire to prevent the overflow and loss of fetal Qi. Yet youths indulge their passions, knowing no fear, often relying on strength to avoid exhaustion, or fighting again after ejaculation. At such times, while the hostess wishes for rest, the guest refuses to stop, acting like a madman banging on doors and windows. Looking at her water-like passion and warm heart, would she not open the door and follow the flow? At this moment, falling flowers fly together with pink butterflies, fire dates and cross-pear fruits escape together. Having merged in filth and flowed together, no one knows that pregnancy occurred yesterday and miscarriage today, or conception on the first day of the month and miscarriage on the fifteenth. This type of spontaneous abortion occurring alongside pregnancy leaves no trace. Because obvious childbirth involves a formed fetus, and minor miscarriage is felt, but hidden miscarriage (An Chan) allows the fetus to slip away like water, how would one know? Thus, midwives often lack experience with major deliveries because there are so many minor miscarriages. Those who marry prostitutes often have no offspring because their uteruses are slippery and accustomed to minor miscarriages. I have seen people in the world struggling with infertility; when asked about their sexual function, they say they can fight; when asked about their technique, they say they are proficient; when asked about their state of mind, they complain and sigh, "Everyone else has children, why do I alone have no husband?" Little do they know that what others experience as obvious childbirth, they experience as hidden miscarriage. Additionally, for those who miscarry frequently in the third, fifth, or seventh months of pregnancy, although this is common among weak women, it is most often caused by unrestrained sexual desire damaging the mother's Qi. Therefore, those who rely on excessive strength and bravery often have no children, due to mutual destruction between strength and weakness; those who indulge without restraint often remain infertile, due to stealing and damaging the Qi of the fetal origin. Is this entirely the fault of women? Those seeking heirs should contemplate potential disasters and prevent them in advance, and then perhaps success can be achieved.