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。
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.