何松庵曰∶《本事方》云，紫苏饮治妊娠胎气不和，怀胎近上，胀满疼痛，名子悬。子悬者，浊气举胎上
凑也。胎热气逆，心胃胀满，此证挟气者居多。疏气舒郁，非紫苏、腹皮、川芎、陈皮，无以流气；非归、芍，
无以养血，气血既利，而胎自降。然邪之所凑，其人必虚，故以人参、甘草补之。
陈良甫曰∶妊娠心腹胀满者，由腹内素有寒气，致令停饮，与气相争，故令心腹胀满也。
赵养葵曰∶有胎从心腹凑上者，名曰子悬。此命门火衰，胎在腹中寒冷，不得已，上就心火之温暖，须理
中汤，不应，八味丸作汤。
慎斋按∶以上四条，序胎前心腹胀满，有子悬之证也。胎气上逼心胸，正以气血壅郁胎元，郁久则热。故
良甫主于胎热气逆，松庵主于浊气举胎，是以火热立论为当。若《大全》以寒气冷冻饮料，养葵以命门火衰论子悬
证，必以人之壮弱，脉之迟数为凭。如禀浓质壮，脉来洪数，而心腹胀满者，此子悬之属火热为病也。如脾胃素
虚，脉来迟细，而心腹胀满者，此子悬之属虚寒为患也，则百不失一矣。
慎斋按∶命门为男子藏精，女子系胞之所。胎孕受于命门，命门之火，即是元气养胎。故有日长之势。譬
如果实，生于春而结于夏，夏月热盛，则果实渐长，至秋冬肃杀，则果实黄殒而落。胎在母腹，若命门火衰，
势必堕殒，岂有上就心火而为子悬之证。至云不得已三字，尤属可嗤。若必以桂附八味丸
治子悬，夫桂附为堕胎药，恐火未必益，而胎反可虞，明者辨之。
何松庵说：《本事方》记载，紫苏饮用于治疗妊娠胎气不和，怀孕后期胎儿位置偏上，出现胀满疼痛的症状，称为“子悬”。所谓子悬，是指浊气上冲导致胎儿向上顶凑。由于胎热引起气机上逆，导致心胃部胀满，这种证候大多兼夹气滞。要疏通气机、舒展郁结，非用紫苏、腹皮（大腹皮）、川芎、陈皮不可，因为这些药能行气；非用当归、芍药不可，因为这些药能养血。气血通畅后，胎儿自然下降。然而，邪气聚集之处，人体正气必然虚弱，所以用人参、甘草来补益正气。
陈良甫说：妊娠期间出现心腹胀满，是因为腹内素有寒气，导致水饮停聚，与气相互搏争，从而引起心腹胀满。
赵养葵说：有胎儿从心腹部向上顶凑的情况，名叫子悬。这是由于命门火衰，胎儿在腹中感到寒冷，不得已而向上寻求心火的温暖。治疗需用理中汤，如果无效，再用八味丸煎汤服用。
慎斋按语：以上四条论述了胎前心腹胀满，属于子悬的证候。胎气上逼心胸，正是因为气血壅滞郁结于胎元，郁久则化热。因此，陈良甫主张胎热气逆，何松庵主张浊气举胎，以火热立论是恰当的。如果像《大全》那样认为是寒气冷冻饮料所致，或者赵养葵认为子悬证是由于命门火衰，必须根据患者的体质强弱、脉象的迟数来判断。如禀赋浓厚、体质壮实，脉象洪数，且伴有心腹胀满者，这是子悬属于火热为病。如脾胃素虚，脉象迟细，且伴有心腹胀满者，这是子悬属于虚寒为患，这样诊治百不失一。
慎斋按语：命门是男子藏精、女子系胞的地方。胎孕受于命门，命门之火即是元气，用以养胎，因此有日益生长的趋势。这就像果实，生于春季而在夏季结果，夏季暑热旺盛，果实逐渐长大，到了秋冬肃杀之时，果实变黄枯萎掉落。胎儿在母腹中，如果命门火衰，势必会导致流产或死亡，怎么会有向上寻求心火温暖而成为子悬证的呢？至于说“不得已”这三个字，更是可笑。如果一定要用桂附八味丸治疗子悬，桂枝、附子是堕胎药，恐怕火未必能补益，反而会让胎儿产生危险，明智的人应当辨别清楚。
He Song'an stated: *Ben Shi Fang* (Case Records of the Hand of Ability) records that Zisu Yin (Perilla Decoction) is used to treat disharmony of fetal qi during pregnancy, where the fetus rises near the upper abdomen, causing distension and pain, a condition named "Zi Xuan" (Fetal Suspension). Zi Xuan refers to turbid qi rising and pushing the fetus upward. Due to fetal heat causing rebellious qi, leading to fullness and distension in the heart and stomach, this syndrome mostly involves qi stagnation. To diffuse qi and relieve depression, one cannot do without Zisu (Perillae Folium), Fupi (Magnoliae Fructus or Magnoliae Cortex? Note: In context of Zisu Yin, usually Dafupi - Pericarpium Citri Reticulatae or Magnoliae Fructus, here translated as Abdominal Skin/Pericarpium based on common usage in this formula context, often interpreted as Da Fu Pi - Arecae Pericarpium), Chuanxiong (Ligustici Rhizoma et Radix), and Chenpi (Citri Reticulatae Pericarpium) to circulate qi; one cannot do without Danggui (Angelicae Sinensis Radix) and Shaoyao (Paeoniae Radix) to nourish blood. Once qi and blood are unobstructed, the fetus naturally descends. However, where pathogenic factors gather, the person must be deficient; therefore, Renshen (Ginseng Radix) and Gancao (Glycyrrhizae Radix et Rhizoma) are used to tonify deficiency.
Chen Liangfu stated: Heart and abdominal distension and fullness during pregnancy result from pre-existing cold qi in the abdomen, which causes fluid retention. This fluid retention contends with qi, thereby causing heart and abdominal distension and fullness.
Zhao Yangkui stated: When the fetus pushes upward from the heart and abdomen, it is called Zi Xuan. This is due to the decline of Mingmen Fire (Fire of the Gate of Life), causing the fetus to feel cold within the abdomen. Compelled by this cold, the fetus seeks the warmth of Heart Fire above. Treatment requires Lizhong Tang (Regulate the Middle Decoction); if ineffective, Bawei Wan (Eight-Ingredient Pill) should be decocted and taken.
Shenzhai commented: The above four passages describe antepartum heart and abdominal distension and fullness, categorizing them under the syndrome of Zi Xuan. Fetal qi pressing upward against the heart and chest is precisely because qi and blood are congested and depressed within the fetal origin. Prolonged depression generates heat. Therefore, Chen Liangfu's emphasis on fetal heat and rebellious qi, and He Song'an's emphasis on turbid qi lifting the fetus, are appropriate when theorizing based on fire and heat. If, as in *Da Quan*, the cause is attributed to cold qi and frozen drinks, or if Zhao Yangkui attributes Zi Xuan to the decline of Mingmen Fire, diagnosis must rely on the patient's physical strength and whether the pulse is slow or rapid. For those with robust constitution and strong physique, presenting with a surging and rapid pulse along with heart and abdominal distension, this indicates Zi Xuan caused by fire and heat. For those with inherent spleen and stomach deficiency, presenting with a slow and fine pulse along with heart and abdominal distension, this indicates Zi Xuan caused by deficiency and cold. Such differentiation ensures high accuracy.
Shenzhai commented further: Mingmen is the site where men store essence and women anchor the uterus. Conception originates from Mingmen, and the fire of Mingmen constitutes Yuan Qi (Original Qi), which nourishes the fetus, giving it a tendency for daily growth. This is like fruit: born in spring and formed in summer. During the hot summer months, fruits gradually grow; in autumn and winter, when nature becomes desolate and killing, fruits turn yellow, wither, and fall. If Mingmen fire declines while the fetus is in the mother's womb, abortion or death is inevitable. How could there be a case of seeking the warmth of Heart Fire and becoming a Zi Xuan syndrome? The phrase "compelled by necessity" (bu de yi) is particularly ridiculous. If one insists on using Guifu Bawei Wan (Cinnamon Twig and Aconite Eight-Ingredient Pill) to treat Zi Xuan, since Guizhi (Cinnamomi Ramulus) and Fuzi (Aconiti Lateralis Radix Praeparata) are abortifacient drugs, it is feared that the fire may not be benefited, but the fetus might instead be endangered. Wise practitioners should distinguish this clearly.