Histological dating endometrium

07-Dec-2017 01:29 by 6 Comments

Histological dating endometrium

In case of implantation, however, the endometrial lining is neither absorbed nor shed. The decidua becomes part of the placenta; it provides support and protection for the gestation.If there is inadequate stimulation of the lining, due to lack of hormones, the endometrium remains thin and inactive.

It is possible to identify the phase of the menstrual cycle by reference to either the ovarian cycle or the uterine cycle by observing histological differences at each phase—for example in the ovarian cycle: The endometrium is the innermost glandular layer and functions as a lining for the uterus, preventing adhesions between the opposed walls of the myometrium, thereby maintaining the patency of the uterine cavity.

In humans, the cycle of building and shedding the endometrial lining lasts an average of 28 days.

The endometrium develops at different rates in different mammals.

Various factors including the seasons, climate, and stress can affect its development.

The endometrium itself produces certain hormones at different stages of the cycle and this affects other parts of the reproductive system.

The endometrium is the inner epithelial layer, along with its mucous membrane, of the mammalian uterus.

It has a basal layer and a functional layer; the functional layer thickens and then is sloughed during the menstrual cycle or estrous cycle.The endometrial lining is either reabsorbed (estrous cycle) or shed (menstrual cycle).In the latter case, the process of shedding involves the breaking down of the lining, the tearing of small connective blood vessels, and the loss of the tissue and blood that had constituted it through the vagina.In contrast, endometrium that is chronically exposed to estrogens, but not to progesterone, may become hyperplastic.Long-term use of oral contraceptives with highly potent progestins can also induce endometrial atrophy.During the menstrual cycle or estrous cycle, the endometrium grows to a thick, blood vessel-rich, glandular tissue layer.

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