What is the thickness of the menstrual endometrium?

The uterus is a very important organ for women. The outside of the uterus includes a thin membrane called the endometrium. The thickness of the endometrium is not fixed. It changes at different times and is also an important criterion for detecting whether it is a pathological change. Therefore, many women are concerned about the thickness of the menstrual endometrium. So, what is the thickness of the menstrual endometrium? Let’s take a closer look at it below.

Proliferative phase: approximately from the 5th to the 9th day of the menstrual cycle, the endometrium is very thin, the glands are sparse, the glandular ducts are narrow and straight, and the glandular cavity surface is flat.

During the 10th to 14th day of the menstrual cycle, the endometrium becomes thicker and wavy, the glands and stroma proliferate significantly, and the number of glands begins to increase.

Secretory phase: From the 15th to the 19th day of the menstrual cycle, which is 1 to 5 days after ovulation, the endometrium continues to thicken and the glands further increase in size and curvature.

Around the 20th to 24th day of the menstrual cycle, which is 6 to 10 days after ovulation, the endometrium shows a high degree of secretory activity, and the curvature and expansion of the glands reach a peak.

In the late secretory phase, the thickness of the endometrium is about 5 to 6 mm.

Premenstrual period: approximately from the 25th to the 28th day of the menstrual cycle, which is 11 to 14 days after ovulation, which is equivalent to the regression period of the corpus luteum. The glands and glandular epithelial cells begin to shrink, degenerate, and secretions dry up, showing a phenomenon of exhaustion, and the thickness of the endometrium decreases by 1/5 to 1/3.

4 to 24 hours before the onset of menstruation, local spasmodic contraction occurs in the intimal spiral arterioles, causing ischemia and necrosis of the intima distal to the spasm. The permeability of the blood vessel wall increases, followed by vasodilation, and blood flows out of the broken blood vessels.

The above is an introduction to the thickness of the menstrual endometrium. I hope it will be helpful for women to understand. The thickness of the endometrium is not exactly the same. In normal times, you can judge your health condition based on these values. If you find any abnormalities, it is best to seek timely diagnosis and treatment. If the condition is serious, it is very likely to cause infertility.