What does 9mm endometrium mean?

The endometrium exists inside the uterus, but many friends do not know much about some of the knowledge points about the endometrium. An endometrium of 9mm actually means a more suitable stage for conception, because the thickness of the endometrium is different in each period, and the thickness can also reflect whether the conditions for conception are met.

Is 9mm endometrial thickness normal?

The thickness of a woman's endometrium changes with the menstrual cycle. Generally speaking, the normal thickness of the endometrium is between 2mm and 10mm. It is thickest during ovulation and falls off during menstruation, leaving only the basal layer. Currently, most people believe that an endometrial thickness of 8mm-10mm is more suitable for conception.

The endometrium is attached to the periphery of the placenta and plays a role in protecting the placenta. During childbirth, uterine contractions are used to protect uterine bleeding. After the placenta falls off from the uterine wall, the uneven surface of the endometrium with blood clots will gradually become smooth and new endometrium will be produced. The scar formed by the detachment of the placenta will also recover to a relatively smooth state about one month after delivery, and gradually return to its pre-pregnancy appearance and remain at a normal size.

Because each woman's physique is different, the standard of endometrial thickness is also different for each woman. It is recommended to do a vaginal B-ultrasound three days after the menstruation ends to understand the specific thickness of the endometrium. If the endometrium is thick, menstruation is prone to dysmenorrhea and the fertilized egg is difficult to implant. If the endometrium is too thin, it can easily cause scanty menstruation and even affect ovulation.

However, the thickness of the endometrium cannot determine whether or not you can get pregnant. The key to whether or not you can get pregnant is whether or not you ovulate. This is because some women can still successfully implant despite having a thin endometrium, while some women have difficulty implanting despite having a normal endometrium. This requires the doctor's experience to make a judgment, while also considering the possibility of other lesions. There are many reasons for infertility, not only the problem of endometrial thickness, but also other factors such as ovarian factors, fallopian tube factors, cervical factors, etc., which require clear judgment before effective treatment.

Changes in the endometrium during each period

1. Proliferative stage: Around the 5th to 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.

2. Secretory phase: From the 15th to the 19th day of menstruation, 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.

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

4. 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.

5. 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.