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According to the *Zhu Bing Yuan Hou Lun* (Treatise on the Pathogenesis and Manifestations of All Diseases), there are cases where the placenta is not expelled after the birth of the infant, a condition known in common parlance as "Xi Bao" (Stagnant Placenta). This occurs because the mother's body is exhausted from delivery and unable to exert further effort. The meridians of the uterus stagnate, allowing external cold qi to invade. Consequently, the blood channels become obstructed, preventing the expulsion of the placenta.
If the umbilical cord is forcibly pulled and severed, the retraction of the placenta upwards can endanger the mother's life.

The *Chan Jing* (Classic of Childbirth) states: "(When the placenta fails to descend, swallowing this will cause it to come down immediately, bringing great auspiciousness.)"
Another prescription: Boil bowstrings in water until they simmer slightly, and drink approximately one sheng.
Another prescription: Consume large amounts of lard.

*Taohongjing Bencao Zhu* (Commentary on Materia Medica by Tao Hongjing) states: Swallow a small amount of sesame oil.
Another prescription: Tie a bowstring around the waist.

The *Ge Shi Fang* (Prescriptions of Ge) states: Burn menstrual cloth into ash and take a small amount orally.
Another prescription: Grind gleditsia sinensis seed pods into powder, insufflate into the nose to induce sneezing, which will cause the placenta to descend.
Another prescription: Untie hair and insert it into the throat to induce vomiting; this is effective.

The *Seng Shen Fang* (Prescriptions of Monk Shen) states: Take mercury equivalent to two small beans in size.
Another prescription: Place a husband's single-layer garment or handkerchief over a well mouth; the placenta will emerge immediately.

The *Duan Ju Fang* (Short Drama Prescriptions) states: Decoct wheat and adzuki beans together, drink the juice, and the placenta will be expelled immediately.
Another prescription: Swallow clods of earth from a well bottom, sized like a wutong seed.

The *Qian Jin Fang* (Prescriptions Worth a Thousand Gold) states: Take rhizoma cyperi powder (Puhuang), sized like a date.
Another prescription: Males swallow seven adzuki beans; females swallow fourteen. (This is consistent with the *Ji Yan Fang*.)

The *Ji Yan Fang* (Verified Prescriptions) states: Use half a jin of achyranthes bidentata root (Niuxi) and three sheng of okra seeds (Kuizi). Chop them, decoct in seven sheng of water to obtain three sheng of liquid, and divide into three doses. (This is consistent with the *Yi Men Fang*.)

The *Long Men Fang* (Dragon Gate Prescriptions) states: Take yellow earth powder from a stove and apply it to the navel. (Note: The *Guang Ji Fang* suggests taking three finger-pinches with water.)

The *Chan Jing* states: Whenever one wishes to inter the placenta, one must first wash the uterine membrane thoroughly with clean water until it is pristine. Use a new clay urn with a new lid. Afterward, wrap the placenta completely in genuine crimson silk. Place five Zigong coins at the bottom of the urn on a sieve, ensuring the inscriptions face upward. Then place the wrapped placenta into the urn, cover it, seal it tightly with mud to prevent any insects or animals from accessing it. Finally, following the Monthly Diagrams (taboo charts based on lunar months), have a male practitioner perform the ritual. Dig a pit three chi and two cun deep, compact the soil firmly to prevent future disturbance. Those who follow this method will ensure their child lives long, remains pure and beautiful, possesses a noble heart and virtuous character, and attains sage-like wisdom and wealth. Furthermore, if one desires the child to inherit the father's talents, place a new brush upon the placenta before interment for great auspiciousness. This is a secret text from the Hundred and Twenty Divinations of the Yellow Emperor. Moreover, the person entrusted with interring the placenta should be a reputable and virtuous scholar; this will endow the child with discernment, wisdom, a good reputation, and talent, ensuring lifelong health, wealth, and longevity.
It also states: One method involves washing the placenta with water until clean, then rinsing it with clear wine. Place the placenta in a new clay urn. Take one chick, wrap it in cloth or silk, place it on top of the placenta, cover the urn with a tile, and bury it. Inter it in an auspicious position according to the Twelve-Month Diagram. Choose a sunny location, no deeper than three chi, compact the soil firmly, and do not reopen it; this brings great auspiciousness. Use a male chick for a boy and a female chick for a girl. (Another view argues: As the Tathagata said, 'I do not kill living beings, thus I attain longevity. Why kill to seek longevity?' Therefore, this practice is rejected.)
It also states: For those who frequently suffer miscarriages, the method for interring the placenta is as follows: In ancient times, while at Leize, Yu the Great encountered a woman weeping bitterly. When asked why, she replied that her family had lost many children to premature death, leaving none alive, hence her grief. Yu taught her this method, and all subsequent children lived long without premature loss. Select the delivered placenta, carefully remove grass and dust, and wash it clean. Mold a clay figurine; if a boy was born, make a male figure; if a girl, a female figure. Wrap the figurine in red clothing. First, place three coins in a new urn. Place the clay figurine on the coins, then place the placenta on the coins. Cover with a new bowl and seal tightly with mud. On an auspicious spot, let the child's father dig and bury it personally. Upon completion, recite the incantation: "One coin serves as your lord of the land, one coin governs your lifespan, one coin provides for your sustenance." Then, stomp on the grave with the left foot. Compact the soil as described above. (Note: In later texts, "Er Gong" refers to the child's father.)