半产多在三个月。及五七月。除跌扑损伤外。若前次怀胎三个月而堕者。下次有孕。如期
复然。盖先于此时受伤。故后期必应。乘其虚也。必须预服健脾、益气、养荣药于一有孕之
日。日日不可缺乃可。
胎元不足倦怠。或胎动不安。或身微热。减食。
人参 当归 怀熟地(各二钱) 白术(二钱五分) 条芩(八分) 陈皮 苏叶(各四分) 砂仁
(三分) 如烦渴。加麦冬(一钱) 枣(五枚) 水煎服。如腰疼脾腿痛。必一日夜服三帖可安
呕吐痰水。心烦闷。头重。目眩。恶闻食气。胎动。腰腹痛。下血等症。用四物汤加黄 。
白术。甘草。黄芩。阿胶。人参。桑寄生。(如无真寄生。以续断代之。)
怀孕三月。恶心而阻隔饮食是也。亦有六七个月。尚病呕者治同。然肥人责之痰。瘦人责之
火。俱宜二陈汤。加白术。黄芩。或加香附。砂仁。姜汁。竹茹。与吐家同。如或因气者。
脉必沉 。治兼舒郁。加抚芎。香附。不可过用辛药。妊娠禀受怯弱。便有阻病。状如病酒。
颜色如故。脉息和顺。但觉肢体沉重。头目昏眩。择食恶食。好酸咸物。若甚者。则作寒热
。心下愤闷。呕吐痰水。恍惚不支。古名恶阻。治先脾胃而清火。化痰。如吐甚者。愈止愈
吐。仲景云。停药月余自安。
孕妇饮食失宜。停滞作呕。宜和平消导。不可作恶阻治。如脾胃弱者。加人参。白术。治恶
阻必用大半夏汤。加减如头眩痰多。加旋复花。有火加姜汁。炒黄连。竹茹。
小产（早期流产）多发生在怀孕三个月时，以及五个月或七个月时。除了因跌打损伤导致的情况外，如果上一次怀孕到三个月时发生流产，那么下一次怀孕后，往往会在相同的时间再次流产。这是因为在之前的这个时间点已经受到了损伤，所以后期必然会出现相应的症状，这是由于身体虚弱所致。因此，必须在发现怀孕的第一天起，预先服用健脾、益气、养血荣身的药物，并且每天都不能间断，这样才能起到安胎的作用。
若出现胎元不足导致的倦怠乏力，或者胎动不安，或者身体微微发热、食欲减退等症状，可使用以下方剂：人参、当归、怀熟地（各二钱）、白术（二钱五分）、条芩（八分）、陈皮、苏叶（各四分）、砂仁（三分）。如果出现烦渴的症状，加麦冬（一钱）、大枣（五枚），用水煎服。如果出现腰疼、脾腿痛的症状，必须在一昼夜内服用三帖才能安定。
对于呕吐痰水、心烦闷、头重、目眩、厌恶食物气味、胎动、腰腹痛、下血等症状，使用四物汤加入黄柏、白术、甘草、黄芩、阿胶、人参、桑寄生。（如果没有真正的桑寄生，可以用续断代替。）
怀孕三个月时，出现恶心并阻碍饮食摄入，这就是恶阻（妊娠呕吐）。也有怀孕六到七个月仍然患呕吐病的，治疗方法相同。但是，对于体型肥胖的人，病因责之于痰湿；对于体型瘦弱的人，病因责之于火邪。这些都适宜使用二陈汤，加入白术、黄芩，或者加入香附、砂仁、姜汁、竹茹。这与治疗一般呕吐的方法相同。如果是由于气滞引起的，脉象必定沉涩，治疗需兼顾疏解郁结，加入抚芎（川芎的一种）、香附。不可过度使用辛温药物。孕妇如果先天禀受怯弱，就会出现阻病，症状如同醉酒一般，但面色如常，脉息和顺，只是觉得肢体沉重，头目昏眩，挑食或厌食，喜好酸咸食物。如果病情严重，则会出现寒热往来，心下愤闷，呕吐痰水，精神恍惚支撑不住。古时候称之为“恶阻”。治疗应先调理脾胃，同时清火、化痰。如果呕吐非常严重，越止吐反而吐得越厉害，张仲景说，停药一个月左右自然会痊愈。
如果孕妇因为饮食不当，导致食物停滞而呕吐，适宜采用平和的消导方法，不能当作恶阻来治疗。如果脾胃虚弱，可以加入人参、白术。治疗恶阻必须使用大半夏汤，根据症状加减：如果头眩痰多，加入旋复花；如果有火邪，加入姜汁、炒黄连、竹茹。
Spontaneous abortion (early miscarriage) often occurs at three months of pregnancy, as well as at five or seven months. Excluding cases caused by falls or physical trauma, if a previous pregnancy ended in miscarriage at three months, the next pregnancy will likely result in miscarriage at the same gestational age. This is because injury occurred at that specific time previously, so the consequence must manifest later; this is due to bodily deficiency. Therefore, one must pre-administer herbs that strengthen the spleen, tonify qi, and nourish blood and essence from the day pregnancy is confirmed. These must be taken daily without interruption to be effective.
If there is insufficiency of the fetal origin leading to fatigue and listlessness, or restless fetus, or slight fever with reduced appetite, use the following prescription: Ren Shen (Ginseng Radix), Dang Gui (Angelicae Sinensis Radix), Huai Shu Di (Prepared Rehmanniae Radix) (each 2 qian), Bai Zhu (Atractylodis Macrocephalae Rhizoma) (2.5 qian), Tiao Qin (Scutellariae Baicalensis Radix) (8 fen), Chen Pi (Citri Reticulatae Pericarpium), Su Ye (Perillae Folium) (each 4 fen), Sha Ren (Amomi Fructus Rotundus) (3 fen). If symptoms of irritability and thirst occur, add Mai Dong (Ophiopogonis Radix) (1 qian) and Zao (Jujubae Fructus) (5 pieces). Decoct in water and take orally. If lower back pain or pain in the spleen/leg area occurs, three doses must be taken within one day and night to stabilize the condition.
For symptoms such as vomiting of phlegm-water, mental restlessness and oppression, heavy head, vertigo, aversion to food odors, restless fetus, lower back and abdominal pain, and vaginal bleeding, use Si Wu Tang (Four Substances Decoction) added with Huang Bo (Phellodendri Cortex), Bai Zhu, Gan Cao (Licorice Root), Huang Qin (Scutellariae Radix), E Jiao (Donkey-hide Gelatin), Ren Shen, Sang Ji Sheng (Taxilli Herba). (If genuine Sang Ji Sheng is unavailable, replace it with Xu Duan [Dipsaci Radix].)
Nausea and obstruction of food intake occurring at three months of pregnancy constitute E Zu (Hyperemesis Gravidarum/Pregnancy Vomiting). Some women suffer from vomiting even at six or seven months; the treatment is the same. However, for obese individuals, the etiology is attributed to Phlegm; for thin individuals, it is attributed to Fire. All these cases are suitable for Er Chen Tang (Two-Aged Powder) added with Bai Zhu and Huang Qin, or alternatively added with Xiang Fu (Cyperi Rhizoma), Sha Ren, Jiang Zhi (Zingiberis Rhizoma Recens Juice), and Zhu Ru (Bambusae Caulis in Taenia). This aligns with the treatment for general vomiting. If caused by Qi stagnation, the pulse will likely be deep and choppy; treatment should address soothing depression, adding Fu Xiong (Chuan Xiong/Achyranthis Bidentatae Radix variant) and Xiang Fu. Caution against excessive use of acrid/warm herbs. Pregnant women with innate constitutional weakness may develop "Zu Bing" (obstruction disease), presenting like intoxication but with normal complexion and smooth pulse, yet feeling heavy limbs, dizzy head and eyes, selective eating or anorexia, and craving sour/salty flavors. In severe cases, alternating chills and fever occur, mental oppression below the heart, vomiting of phlegm-water, and mental confusion with inability to sustain oneself. Ancient texts name this "E Zu". Treatment should first regulate the Spleen and Stomach, clear Fire, and resolve Phlegm. If vomiting is severe, anti-emetics may paradoxically increase vomiting; Zhang Zhongjing stated that stopping medication allows self-recovery after about a month.
If vomiting results from improper diet causing food stagnation, mild digestive promotion is appropriate; do not treat as E Zu. If the Spleen and Stomach are weak, add Ren Shen and Bai Zhu. Treating E Zu requires Da Ban Xia Tang (Large Pinellia Decoction), modified as follows: for dizziness and abundant phlegm, add Xuan Fu Hua (Inulae Flos); for Fire, add Jiang Zhi, Chao Huang Lian (Stir-fried Coptidis Rhizoma), and Zhu Ru.