Endometriosis: the consequence of uterine denervation–reinnervation

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Uterine nerve injuries from difficult childbirth or straining during defecation cause denervation and reinnervation, leading to endometriosis symptoms like pain and infertility.

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The paper proposes a mechanistic framework linking difficult obstetric events—uterine nerve injury and uterosacral ligament injury caused by intrapartum complications and straining during defecation—to subsequent neuroanatomical changes and ectopic endometrial persistence. It argues that uterine denervation leads to loss of fundocervical polarity, uterotubal dysmotility, and retrograde menstruation, which then enables ectopic endometrium to adhere to injured uterosacral ligaments and peritoneal surfaces, with characteristic laparoscopic appearance depending on injury site, extent, and timing. Tissue repair and uterine reinnervation are presented as contributors to chronic pelvic pain, dysmenorrhea, dyspareunia, and subfertility, with the main caveat that the account is largely inferential and descriptive rather than based on new, direct experimental or clinical measurements in the paper. This paper is centrally about endometriosis — it frames endometriosis development and symptoms as consequences of uterine denervation–reinnervation and related injury/repair processes.

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Abstract

Difficult intrapartum episodes and persistent straining during defecation cause injuries to uterine nerves and uterosacral ligaments. Injuries to uterine nerves (denervation) result in loss of fundocervical polarity, uterotubal dysmotility and retrograde menstruation. Ectopic endometrium, delivered by retrograde menstruation, adheres to injuries to uterosacral ligaments and peritoneal surfaces. Difficult vaginal deliveries result in laparoscopic appearances of asymmetry of uterosacral ligaments with, or without, ectopic endometrium. Straining during defaecation causes the “classic” appearances of nulliparous endometriosis including hypertrophy of the uterosacral ligaments often with large volumes of ectopic endometrium. Laparoscopic appearances depend on the site, nature, extent, and timing of tissue injury, as well as the presence of available endometrium. Tissue repair, including reinnervation in the uterine isthmus, cervix, vagina and uterosacral ligaments, contributes to chronic pelvic pain, dysmenorrhea, dyspareunia and subfertility some time after the primary injuries. Similar content being viewed by others

References

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Condition tags

mesh:D004715mesh:D017699endometriosis

MeSH descriptors

Autonomic Nervous System Endometriosis Pelvic Pain Peripheral Nerve Injuries Uterus Autonomic Nervous System Chronic Disease Defecation Defecation Delivery, Obstetric Delivery, Obstetric Endometriosis Endometriosis Female Humans Menstruation Disturbances Menstruation Disturbances Pelvic Pain Peripheral Nerve Injuries Peripheral Nerve Injuries

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