Zhuan nü Wei Nan Turning Female to Male: an Indian Influence on Chinese Gynaecology?

TL;DR

Chen Ming compares early and medieval Chinese, Indian Ayurvedic, Buddhist, and Tibetan texts on fetal sex determination and female-to-male transformation. The article argues that Chinese and Indian traditions share broad assumptions about sex being set at conception and malleable in the first trimester, but differ in timing rules and ritual logic, and it treats possible Indian influence as suggestive rather than proven.

Key findings

• Chinese sources from the Mawangdui *Taichanshu* (tomb closed 168 BCE) to Sun Simiao’s seventh-century *Qianjinfang* link fetal sex to intercourse timing: *Taichanshu* says the first day after menstruation yields a boy and the second a girl; Sun Simiao lists the first, third, and fifth days for a boy and the second, fourth, and sixth for a girl. Indian Ayurvedic texts instead assign boys to the fourth, sixth, eighth, tenth, and twelfth days after menstrual flow and girls to the fifth, seventh, ninth, and eleventh; the thirteenth day is infertile. The author says both traditions share an odd/even principle but enumerate differently because Chinese and some Tibetan texts recalculate after three days.
• Both traditions hold that sex is determined at conception yet not fixed until early pregnancy: Chinese texts say the fetus lacks a fixed form in the first three months and can be influenced; the Indian *Pumsavana* rite must occur in the third month before sex manifests; the Tibetan *Rgyud-bzi* says methods must be applied before the second week. Chinese female-to-male conversion means shaping an undifferentiated fetus into a male, not changing an already female fetus.
• Buddhist “turning the female body male” concerns rebirth or a future life, not fetal sex; Daoist stories similarly concern adult or future transformation. Chinese recipes use symbolic masculine objects such as bows, arrows, axes, crossbow string, male grass, and drake feathers, plus inner visualization; Indian Ayurvedic methods center on *Pumsavana* and herbal or ritual remedies.
• The Tibetan *Rgyud-bzi* parallels Indian Ayurvedic embryology on semen/blood ratio and timing but has a unique day enumeration. The author finds no direct proof of transmission from Indian Buddhist to Chinese medical literature, only continuities in idiom and practice that warrant further study.

Methods

• Comparative textual and historical study of early and medieval Chinese medical manuscripts and texts (*Taichanshu*, Sun Simiao, Chao Yuanfang, Dunhuang medical manuscripts, *Ishimpo*, and others) alongside Indian Ayurvedic classics (*Caraka-samhita*, *Susruta-samhita*, *Astanga Samgraha*, *Astanga-hrdaya-samhita*), Buddhist sutras, the *Manava Dharmasastra*, and the Tibetan *Rgyud-bzi*.
• Analysis focuses on three themes: timing of conception, physiology of fetal sex (semen versus menstrual blood or *jing*), and rituals or remedies for influencing sex; it compares terminology and concepts such as *zhuan* and *Pumsavana*.
• No quantitative data or systematic sampling; the argument is built from close reading of cited passages and secondary translations or editions.

Limitations

• Stated: the author cannot assert with certainty that Chinese female-to-male theory derives from Indian Ayurvedic or Buddhist culture; direct evidence for transmission from Indian Buddhist to Chinese medical literature is lacking; research is preliminary.
• Stated: sources are uneven and sometimes known through later citations or translations; the article notes contradictions within traditions and differences in timing and ritual details.
• Evident from the text: the case rests on parallels, shared idioms, and textual genealogies rather than demonstrable historical transmission; reliance on translations and secondary editions may limit certainty.