Which psychiatrist wrote the first treatise on puerperal mental illness?

The correct response is that Louis Victor Marce authored the first treatise on puerperal mental illness. Marce, a French psychiatrist in the 19th century, is renowned for his pioneering work in understanding mental health conditions associated with childbirth, which he termed "puerperal insanity." His treatise systematically explored the psychological effects of childbirth on women, paving the way for future research and clinical practices concerning perinatal mental health.

Marce's contributions were foundational in recognizing that childbirth could trigger various mental health issues, thus establishing the importance of this specialty within psychiatry. As a result, he is widely considered a key figure in the history of mental health related to the perinatal period, marking him as a significant early advocate for the mental well-being of postpartum women.