How normal is the thickness of the endometrium? Four methods for thickness measurement

The uterus is an important part of women, and reasonable maintenance should also be paid attention to, especially the thickness of the endometrium, which can also affect women's health. The thickness of the endometrium needs to be taken seriously.

Periodic changes in the endometrium

1. Proliferative period: On the 5th to 14th day of the menstrual cycle. The thickness of the endometrium during this period increased from 0.5mm to 3-5mm. The proliferation period is divided into early appreciation, middle appreciation, and late appreciation. In the early stages of proliferation, which is 5-7 days of the menstrual cycle, the endometrium is relatively thin, only 1-2 millimeters. The mid-term of appreciation is on the 8th to 10th day of the menstrual cycle, with an increase in endometrial glands. By the 11th to 14th day of the menstrual cycle, it has entered the late proliferative stage, and the endometrium has further thickened, reaching 3-5mm.

2. Secretion period: the 15th to 28th day of the menstrual cycle. The endometrium increased from 5mm to 10mm. This phase corresponds to the luteal phase in the ovarian cycle. The secretion phase is divided into early secretion, middle secretion, and late secretion. Early secretion occurs on the 15th to 19th days of the menstrual cycle, during which the endometrial glands are longer and more curved. The metaphase of secretion is the 20th to 23rd day of the menstrual cycle, and the endometrium is thicker than before, showing a serrated shape. On the 24th to 28th day of the menstrual cycle, this period is the pre menstrual period, equivalent to the luteal phase of degeneration. At this stage, the endometrium is spongy, with a thickness of up to 10mm.

3. Menstrual period: The 1st to 4th day of the menstrual cycle. The collapse and detachment of the spongy functional layer of the endometrium from the grassroots is the final result of the withdrawal of progesterone and estrogen.

Normal endometrial thickness

The endometrium refers to the tissue on the inner wall of the uterus. The endometrium adheres directly to the myometrium, without any underlying tissue between them. The endometrium is divided into three layers: the dense layer, the sponge layer, and the basal layer. The dense layer and sponge layer are sensitive to sex hormones and undergo periodic changes under the influence of ovarian hormones, also known as the functional layer; The basal layer is not sensitive to ovarian hormones and does not undergo periodic changes.

The functional layer of the endometrium is the site of embryo implantation, regulated by changes in ovarian hormones and characterized by periodic proliferation, secretion, and shedding. Grassroots regenerate after menstruation, repair endometrial wounds, and reshape the functional layer of the endometrium.

The normal thickness of the female endometrium is generally 1-10mm. Due to the influence of hormones on the proliferation and detachment of the functional layer of the endometrium, the thickness of the endometrium varies over time. Generally speaking, after the end of menstruation, it gradually proliferates, with the thickest proliferation occurring 24 hours before menstruation. Then, the functional layer of the endometrium tissue falls off and flows out with tissue blood, indicating the onset of menstruation.