Endometrium
Endometrium - Related Videos
05:26
Establishing a Mouse Model of Thin Endometrium
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Cited by 3 •
2024
This article describes a detailed protocol for producing a reliable and reproducible thin endometrium with a very low mortality rate and minimal intrauterine adhesions by injecting 95% ethanol into the mouse uterus within 1-3 min.
07:59
Ultrasonography in Experimental Reproductive Investigations on Rats
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Cited by 6 •
2017
This manuscript describes the utility of ultrasound performed on female rats to design experimental models for reproductive and gynecological investigation. A step-by-step explanation of how to perform ultrasonographic evaluation is shown.
09:15
Two Methods for Establishing Primary Human Endometrial Stromal Cells from Hysterectomy Specimens
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Cited by 14 •
2014
Establishing primary endometrial stromal cell culture systems from hysterectomy specimens is a valuable biological technique and a crucial step prior to pursuing a vast array of research aims. Here, we describe two methods used to establish stromal cultures from surgically resected endometrial tissues of human...
08:02
Mouse Model of Surgically-induced Endometriosis by Auto-transplantation of Uterine Tissue
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Cited by 62 •
2012
A description of the surgical induction of endometriosis in mice and rats by auto-transplantation of uterine tissue to the arterial cascade of the intestinal mesentery.
07:04
A Novel Use of Three-dimensional High-frequency Ultrasonography for Early Pregnancy Characterization in the Mouse
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Cited by 5 •
2017
Mice are widely used to study gestational biology. However, pregnancy termination is required for such studies which precludes longitudinal investigations and necessitates the use of large numbers of animals. Therefore, we describe a non-invasive technique of high-frequency ultrasonography for early detection and monitoring of post-implantation events in the pregnant mouse.
FAQs
Estrogen drives the postmenstrual proliferative phase by stimulating renewed growth of endometrial tissue. This rebuilding restores the functional lining after shedding and establishes the tissue that will later respond to progesterone. In biological terms, estrogen acts earlier in the cycle, creating a responsive substrate rather than directly producing the secretory and vascular preparation associated with implantation.
Progesterone shifts the previously proliferative lining into a state characterized by glandular secretion and vascular changes. These alterations prepare the endometrium for embryo implantation and support conditions needed during early pregnancy. Its role is complementary to estrogen: estrogen promotes rebuilding, whereas progesterone changes the rebuilt tissue into an implantation-ready state.
The two endometrial layers have different responsibilities during the cycle. The functional layer undergoes breakdown and shedding when ovarian hormone levels decline. The deeper basal layer remains and supports regeneration afterward, allowing the lining to be rebuilt during a subsequent cycle. This division explains how repeated menstrual remodeling can occur without complete loss of the tissue.
Menstruation follows a hormonal transition rather than occurring as an isolated event. When fertilization does not occur, ovarian hormone levels decline; that decline triggers breakdown of the functional layer and its subsequent shedding. The sequence links reproductive outcome to tissue remodeling, showing how endocrine signals convert the absence of pregnancy into a visible change in uterine lining.
Researchers study the endometrium to connect cyclical remodeling with fertility and implantation. Examining its hormone-responsive changes can help investigate whether the lining is being prepared appropriately for an embryo and early pregnancy. The same biological context also makes endometrial research relevant to menstrual disorders, endometriosis, and abnormal uterine bleeding.
Within biology, the endometrium provides a model for hormone-responsive tissue repair. Its functional layer is repeatedly lost, while the basal layer supports renewal, and ovarian hormones coordinate these changes over the cycle. Studying this system can reveal how endocrine regulation, tissue breakdown, and regeneration interact, while also clarifying mechanisms relevant to reproductive health.