王子亨曰∶经者常候也，谓候其一身之阴阳愆伏，知其安危，故每月一至，太过不及，
皆为不调。阳太过，则先期而至，阴不及，则后时而来。其有乍多乍少，断绝不行，崩漏不
止，皆由阴阳衰盛所致。
丹溪云∶经水不及期而来者，血热也，四物汤加芩、连、香附。肥人不及日数而多者，
痰多血虚有热，南星、白术、苍术、黄连、香附、川芎作丸。
薛氏曰∶先期而至，有因脾经
血燥者，宜加味逍遥散；有因脾经郁滞者，宜归脾汤；有因肝经怒火者，宜小柴胡汤加生地
黄；有因血分有热者，宜四物汤加柴胡、牡丹皮、山栀子；有因劳役火动者，宜补中益气汤
。（丹溪翁只主一热字，而热症内又用苍术、南星等，谁其信之。立斋又分肝脾血分劳役五种，尤为详明。愚谓脾虚气
郁，宜归脾汤；脾实气郁，宜越鞠丸之类为当）
丹溪云∶经水过期血少也，用川芎、当归、人参、白术，兼痰药治之。过期色淡者，痰
多也，二陈汤加芎、归。过期紫黑有块，血热也，必作痛，四物汤加香附、黄连。
薛氏曰∶过期而至，有因脾经血虚者，宜人参养荣汤；有因肝经血少者，宜六味地黄丸；有因气虚血弱
者，宜八珍汤。（血生天脾，故色淡者，宜补脾胃，此参、术所必用也，而丹溪以芎、归为配，不用地黄、芍药者，岂
无深意焉。如立斋养荣、八珍等汤，俱本于此，其用六味丸者，又为补母之法，宜详之）
王子亨说：月经是经常性的征候，通过观察它来了解全身阴阳的盛衰伏藏情况，从而判断身体的安危，所以月经每月来潮一次。如果月经量或周期太过或不及，都属于不调。阳气太过，则月经先期而至；阴气不及，则月经后期而来。如果有经量忽多忽少、经血断绝不行、崩漏不止等情况，都是由阴阳盛衰所导致的。
丹溪说：月经提前来潮的，属于血热证，用四物汤加黄芩、黄连、香附治疗。体型肥胖的人未到经期而经量多的，属于痰多、血虚且有热，用南星、白术、苍术、黄连、香附、川芎制成丸药服用。
薛氏（薛己）说：月经先期而至，有因脾经血燥引起的，宜用加味逍遥散；有因脾经气机郁滞引起的，宜用归脾汤；有因肝经怒火引起的，宜用小柴胡汤加生地黄；有因血分有热引起的，宜用四物汤加柴胡、牡丹皮、山栀子；有因劳役过度导致火动引起的，宜用补中益气汤。（丹溪先生只主张一个“热”字，而在热证中又使用苍术、南星等药，谁能相信呢？立斋先生又分为肝、脾、血分、劳役五种情况，尤为详细明了。我认为脾虚气郁，宜用归脾汤；脾实气郁，宜用越鞠丸之类更为恰当。）
丹溪说：月经过期且量少，用川芎、当归、人参、白术，兼用化痰药治疗。过期且经色淡的，属于痰多，用二陈汤加川芎、当归。过期且经色紫黑有血块的，属于血热，必然伴有疼痛，用四物汤加香附、黄连。
薛氏说：月经过期才来，有因脾经血虚引起的，宜用人参养荣汤；有因肝经血少引起的，宜用六味地黄丸；有因气虚血弱引起的，宜用八珍汤。（血液生于脾，所以经色淡的，宜补脾胃，这是人参、白术必须使用的道理，而丹溪以川芎、当归为配伍，不用地黄、芍药，难道没有深意吗？如立斋先生所用的人参养荣汤、八珍汤等，都基于此理，其使用六味地黄丸的方法，又是“补母”之法，应当仔细研究。）
Wang Ziheng stated: Menses are a regular physiological sign. By observing them, one can ascertain the fluctuation and concealment of Yin and Yang throughout the body, thereby determining health and safety. Thus, menses occur once a month. Any excess or deficiency in volume or timing constitutes irregularity. Excess Yang leads to early onset; deficiency of Yin leads to delayed onset. Variations such as sudden abundance or scarcity, cessation of flow, metrorrhagia (uterine bleeding), or continuous leukorrhea with blood are all caused by the imbalance of Yin and Yang prosperity and decline.
Danxi stated: Early onset of menses is due to Blood Heat. It is treated with Siwu Tang (Four Substances Decoction) added with Huangqin (Scutellariae Radix), Lianzi (Coptidis Rhizoma), and Xiangfu (Cyperi Rhizoma). In obese individuals, excessive flow before the expected date indicates Phlegm accumulation, Blood deficiency, and Heat. This is treated with pills made from Nanting (Arisaematis Cum Bile), Baizhu (Atractylodis Macrocephalae Rhizoma), Cangzhu (Atractylodis Rhizoma), Huanglian (Coptidis Rhizoma), Xiangfu (Cyperi Rhizoma), and Chuanxiong (Ligustici Chuanxiong Rhizoma).
Xue Shi (Xue Ji) stated: Early onset may be caused by Dryness of Blood in the Spleen Meridian, for which Jia Wei Xiao Yao San (Modified Free and Easy Wanderer Powder) is indicated. It may be caused by Stagnation in the Spleen Meridian, for which Guipi Tang (Restore the Spleen Decoction) is indicated. It may be caused by Fire from Anger in the Liver Meridian, for which Xiaochaihu Tang (Minor Bupleurum Decoction) added with Sheng Dihuang (Rehmanniae Radix) is indicated. It may be caused by Heat in the Blood Level, for which Siwu Tang (Four Substances Decoction) added with Chaihu (Bupleuri Radix), Mudanpi (Moutan Cortex), and Shanzhizi (Gardeniae Fructus) is indicated. It may be caused by Fire stirring due to overexertion, for which Buzhong Yiqi Tang (Tonify the Middle and Augment the Qi Decoction) is indicated. (Master Danxi focused solely on "Heat," yet used Cangzhu and Nanting within heat syndromes, which some find hard to believe. Master Lizai further categorized causes into five types involving the Liver, Spleen, Blood level, and Overexertion, which is particularly detailed and clear. I hold that for Spleen Deficiency with Qi Stagnation, Guipi Tang is appropriate; for Spleen Excess with Qi Stagnation, Yueju Wan (Yueju Pill) and similar formulas are more suitable.)
Danxi stated: Delayed menses with scanty flow is treated with Chuanxiong (Ligustici Chuanxiong Rhizoma), Danggui (Angelicae Sinensis Radix), Renshen (Ginseng Radix et Rhizoma), and Baizhu (Atractylodis Macrocephalae Rhizoma), combined with Phlegm-resolving herbs. Delayed menses with pale color indicate Phlegm abundance, treated with Erchen Tang (Two Aged Decoction) added with Chuanxiong (Ligustici Chuanxiong Rhizoma) and Danggui (Angelicae Sinensis Radix). Delayed menses with dark purple color and clots indicate Blood Heat, accompanied by pain, treated with Siwu Tang (Four Substances Decoction) added with Xiangfu (Cyperi Rhizoma) and Huanglian (Coptidis Rhizoma).
Xue Shi (Xue Ji) stated: Delayed onset may be caused by Blood Deficiency in the Spleen Meridian, for which Renshen Yangrong Tang (Ginseng Nourishing the荣 Decoction) is indicated. It may be caused by Blood Scarcity in the Liver Meridian, for which Liuwei Dihuang Wan (Six-Ingredient Rehmannia Pill) is indicated. It may be caused by Qi Deficiency and Blood Weakness, for which Bazhen Tang (Eight Treasures Decoction) is indicated. (Blood is generated by the Spleen; thus, pale color suggests the need to tonify the Spleen and Stomach, making Renshen and Baizhu essential. Danxi paired Chuanxiong and Danggui without using Dihuang and Shaoyao, which must have profound intent. Formulas like Lizai’s Renshen Yangrong Tang and Bazhen Tang are based on this principle. The use of Liuwei Dihuang Wan represents the method of "tonifying the mother," which warrants careful study.)