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Related Concept Videos

Histology of the Uterus01:19

Histology of the Uterus

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The uterine wall consists of three histological layers: the perimetrium, myometrium, and endometrium. The outermost perimetrium is a thin, serous membrane connected with the broad ligament on the sides, which helps anchor the uterus in the pelvic cavity. The thickest layer, myometrium, is mainly made up of smooth muscle tissue bundles. Its contractions are vital in facilitating the expulsion of the uterine lining, fetus, and placenta during menstruation and childbirth.
The endometrium is the...
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In human women, oogenesis produces one mature egg cell or ovum for every precursor cell that enters meiosis. This process differs in two unique ways from the equivalent procedure of spermatogenesis in males. First, meiotic divisions during oogenesis are asymmetric, meaning that a large oocyte (containing most of the cytoplasm) and minor polar body are produced as a result of meiosis I, and again following meiosis II. Since only oocytes will go on to form embryos if fertilized, this unequal...
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Updated: Oct 19, 2025

Mouse Model of Surgically-induced Endometriosis by Auto-transplantation of Uterine Tissue
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Comparing endometriotic lesions with eutopic endometrium: time to shift focus?

Eliza M Colgrave1, Janet R Keast2, Sophie Bittinger3

  • 1Department of Obstetrics and Gynaecology, University of Melbourne and Gynaecology Research Centre, Royal Women's Hospital, Melbourne, Australia.

Human Reproduction (Oxford, England)
|September 18, 2021
PubMed
Summary

Endometriosis exhibits significant heterogeneity in symptoms and lesion presentation. Further histological analysis beyond basic gland and stroma presence may improve patient stratification for better treatment options.

Keywords:
classificationendometriosisendometriotic lesionendometriumhistologymenstrual cycle

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Area of Science:

  • Reproductive biology
  • Pathology

Background:

  • Endometriosis is a complex gynecological condition characterized by significant variability.
  • This heterogeneity impacts patient symptoms, treatment responses, and the appearance of endometriotic lesions.

Purpose of the Study:

  • To explore the histological features of endometriotic lesions and their heterogeneity.
  • To assess the potential of histopathology, beyond standard gland and stroma identification, for improving disease stratification.
  • To consider the relationship between endometriotic lesions and eutopic endometrium.

Main Methods:

  • Review of histological features of endometriotic lesions.
  • Analysis of evidence regarding menstrual cycle responsiveness of lesions.
  • Consideration of parallels between endometriotic and eutopic endometrium.

Main Results:

  • Endometriotic lesions display underappreciated histological heterogeneity.
  • Evidence for and against menstrual cycle responsiveness of lesions is variable.
  • Current histological assessment may be limited by the avoidance of invasive surgery.

Conclusions:

  • Histopathological features beyond simple gland/stroma presence could enhance endometriosis stratification.
  • Developing a comprehensive stratification system is challenging due to disease diversity.
  • Improved histological phenotyping, combined with patient data, is crucial for tailored treatment strategies.