肾主腰脚，其经虚，风冷客之，则腰痛；冷气乘虚入腹，则腹痛。故令腰腹相引而痛不
止，多动胎。腰痛甚者，则胎堕也。
妊娠小腹痛者，由胞络宿有冷，而妊娠血不通，冷血相搏，故痛也。痛甚亦令动胎也。
此谓卒有损动，或冷热不调和，致伤于胎，故卒痛。下血不止者，堕胎也。
吐血，皆由腑脏伤所为。忧思惊怒，皆伤脏腑，气逆，故吐血。吐血而心闷胸满，未欲
止，心闷甚者死。妊娠病之，多堕胎也。
尿血，由劳伤经络而有热，热乘于血，血得热流溢，渗入于胞，故尿血也。
阳施阴化，故得有胎，荣卫和调，则经养周足，故胎得安，而能成长。若血气虚损者，
子脏为风冷所居，则血气不足，故不能养胎，所以致胎数堕。候其妊娠而恒腰痛者，喜堕胎
冬时严寒，人体虚而为寒所伤，即成病为伤寒也。轻者啬啬恶寒，吸吸发热，
微咳鼻塞，数日乃止；重者头痛体疼，憎寒壮热。久不歇，亦伤胎也。
冬时严寒，人体虚，触冒之得病，名伤寒。其状∶头痛、体疼、壮热。瘥后体虚，尚未
平复，或起早，或饮冷过度，病更如初，故谓之复也。
四时之间，忽有非切之气，如春时应暖而反寒，夏时应热而反冷，秋时应凉而反热，冬
时应寒而反温，非其节而有其气。一气之至，无人不伤，长少虽殊，病皆相似者，多挟于毒
。言此时普行此气，故云时气也。妊娠遇之，重者伤胎也。
肾脏主管腰部和下肢，若其经脉虚弱，风冷之邪侵袭，就会导致腰痛；冷气乘虚侵入腹部，就会引起腹痛。因此导致腰腹相互牵引而疼痛不止，容易扰动胎元。腰痛严重的，会导致流产。
妊娠期间小腹痛，是因为胞络（子宫及其脉络）原本有寒气，怀孕后血液运行不畅，寒血相互搏结，所以产生疼痛。疼痛严重也会扰动胎元。
这被称为突然受到损伤或触动，或者冷热失调，从而伤害了胎气，所以突然发生疼痛。如果下血不止，就是流产。
吐血，都是由脏腑受损引起的。忧愁、思虑、惊恐、愤怒都会损伤脏腑，导致气机上逆，所以出现吐血。吐血伴有心胸烦闷胀满，且症状不能停止的，心胸烦闷严重的会死亡。孕妇患此病，多会导致流产。
尿血，是由于劳累损伤经络而生热，热气侵袭血液，血液受热则流动溢出，渗入膀胱，所以出现尿血。
阳气施放，阴气化生，所以才能受孕。营卫之气调和，则经血滋养充足，所以胎元得以安稳，并能正常生长发育。如果气血虚损，子脏（子宫）被风冷占据，则气血不足，所以不能滋养胎元，从而导致多次流产。观察那些怀孕期间经常腰痛的人，容易流产。
冬季严寒，人体虚弱而被寒气所伤，就形成伤寒病。轻度的表现为怕冷、发热、轻微咳嗽、鼻塞，几天后才会停止；重度的表现为头痛、身体疼痛、憎恶寒冷、高热。病情久不缓解，也会伤害胎元。
冬季严寒，人体虚弱，触犯冒犯寒气而得病，称为伤寒。其症状为：头痛、身体疼痛、高热。病愈后身体虚弱，尚未完全恢复，如果早起劳作，或过度饮用冷饮，病情再次像当初一样，所以称为“复”（复发）。
四季之中，忽然出现不合时令的气候，如春天应该温暖却反而寒冷，夏天应该炎热却反而凉爽，秋天应该凉快却反而炎热，冬天应该寒冷却反而温暖，不是那个节气却有那样的气候。一种气候到来，没有人不受伤害，无论老少，病症都相似，大多夹杂毒邪。说此时普遍流行这种气候，所以称为时气（时行疫病）。孕妇遇到这种情况，严重的会伤害胎元。
The Kidney governs the waist and lower limbs. If its meridians are deficient, wind-cold pathogenic factors may invade, causing lower back pain; if cold qi enters the abdomen by taking advantage of this deficiency, abdominal pain occurs. Thus, the waist and abdomen pull each other in pain without cessation, which easily disturbs the fetus. Severe lower back pain may lead to miscarriage.
Abdominal pain during pregnancy is caused by pre-existing cold in the Bao Luo (uterine collaterals). During pregnancy, blood circulation becomes obstructed, and cold blood clashes with normal blood, resulting in pain. Severe pain also disturbs the fetus.
This refers to sudden injury or disturbance, or imbalance between cold and heat, damaging the fetal Qi, hence sudden pain. If bleeding from the vagina continues incessantly, it indicates miscarriage.
Hematemesis (vomiting blood) is caused by damage to the Zang-Fu organs. Worry, overthinking, fright, and anger all injure the Zang-Fu organs, causing Qi rebellion, thus leading to hematemesis. Hematemesis accompanied by chest oppression and fullness that does not cease, especially when severe chest oppression occurs, can be fatal. Pregnant women suffering from this condition often experience miscarriage.
Hematuria (blood in urine) results from labor injuring the meridians and generating heat. Heat invades the blood; when blood is heated, it flows excessively and seeps into the Bladder, causing hematuria.
Yang provides the active force, and Yin provides the transformative substance, allowing conception to occur. When Ying and Wei (Nutritive and Defensive Qi) are harmonious, menstrual nourishment is sufficient, ensuring the fetus remains stable and grows normally. If Qi and Blood are deficient, the Zi Zang (uterus) becomes occupied by wind-cold, leading to insufficient Qi and Blood to nourish the fetus, thereby causing recurrent miscarriages. Those who constantly suffer from lower back pain during pregnancy are prone to miscarriage.
In winter, extreme cold damages the body when it is deficient, resulting in Shang Han (Cold Damage disease). Mild cases present with aversion to cold, fever, slight cough, and nasal congestion, resolving after several days; severe cases involve headache, body aches, aversion to cold, and high fever. If prolonged, it also harms the fetus.
In winter, extreme cold damages the body when it is deficient upon exposure, named Shang Han (Cold Damage disease). Its manifestations include headache, body pain, and high fever. After recovery, if the body remains weak and has not fully recuperated, early rising or excessive consumption of cold drinks can cause the illness to recur as before, hence termed "Fu" (Relapse).
During the four seasons, sudden abnormal climatic conditions may occur: spring should be warm but turns cold; summer should be hot but turns cool; autumn should be cool but turns hot; winter should be cold but turns warm. These are climates inappropriate for the season. When such a climate arrives, no one escapes harm. Although severity varies by age, symptoms are similar, often involving toxic pathogens. Since this climate prevails universally at that time, it is called Shi Qi (Seasonal Epidemic Qi). Pregnant women exposed to it may suffer fetal harm, especially in severe cases.