A layer that makes up the lining of the mammalian uterus,
divided intoFunctional and basal layers.
2/3 of the inner membrane surface is a dense layer and a sponge layer, collectively referred to as functional Layer, which is shed by periodic changes under the influence of ovarian sex hormones.
The basal layer is the 1/3 endometrial close to the myometrium strong>, are generally not affected by ovarian sex hormones and do not undergo periodic changes.
What is the normal thickness of the endometrium? The normal thickness of the endometrium is generally 2-10mm.
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The endometrium responds to both estrogen and progesterone, so it can change with the cycle. Endometrial thickness is related to the cyclical changes of the endometrium, including the histological changes of the endometrium and the biochemical changes of the endometrium.
The cyclical changes of the endometrium are divided into three phases, including the proliferative phase, the secretory phase, and the menstrual phase. Let’s take the 28-day menstrual cycle as an example to explain in detail.
Days 5-14 of the menstrual cycle. Endometrial thickness increased from 0.5mm to 3-5mm during this period.
proliferation stage was divided into early stage, middle stage and late stage.
5th of the menstrual cycle -7 days, the endometrial thickness during this period is 1-2mm; >
On the 8th-10th day of the menstrual cycle, endometrial glands increase and grow;
< p>Late proliferative stage:
On the 11-14th day of the menstrual cycle, the endometrium thickens further, reaching 3-5mm.
Days 15-28 of the menstrual cycle . Endometrial thickness is 5-10mm.
Secretory phase is divided into early secretory, middle secretory and late secretory.
15th of the menstrual cycle -19 days, the endometrial glands are longer and more curved;
Days 20-23 of the menstrual cycle, when the lining of the uterus is thicker and has a sawtooth shape; points
The 24th-28th day of the menstrual cycle, this time is the premenstrual period, which is equivalent to the corpus luteum In the involution stage, the endometrium is spongy and up to 10mm thick.
menstrual cycle day 1-4 . During this period, the level of estrogen decreases and there is no progesterone, and focal necrosis occurs due to ischemia and hypoxia in the intimal arterioles and tissue.
Part of the content comes from the Internet Note: This article is a health science popularization article. The drugs, technologies, products, etc. involved in the article are only needed for expression, and do not have any treatment suggestions. For specific treatment methods, please go to a regular hospital for professional examination and treatment.Hot text introduction* What is the difference between curettage and curettage during abortion ? * How much is normal menstrual flow? A trick to teach you to quickly judge* Will women who do not have sex get gynecological diseases? * Five behaviors that hurt the uterus, try to avoid it! * Women often suffer from low back pain. Have you ever wondered why?
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