Hello, the size of a normal uterus is: length: 7-8cm, width 4-5cm, thickness 2-3cm, and capacity is 5 ml.

It is recommended that you check the following several times to make sure it is correct. Only then can I give you a clear answer! (Because it is constantly changing)

With the cyclic changes of the ovary in the secretory phase, other parts of the genitals also undergo corresponding cyclic changes. Among them, the changes in the endometrium are the most significant. During the ovarian cycle, when follicles develop and mature in the ovary, under the action of the ovary secreting estrogen, the endometrium proliferates, that is, the proliferative endometrium: after ovulation, the corpus luteum of the ovary secretes progesterone and estrogen. Under the condition, the proliferated endometrium will secrete, that is, the endometrium in the secretory phase; after the corpus luteum in the ovary degenerates, due to the reduction in the amount of estrogen and progesterone, the endometrium loses support and becomes necrotic and peels off, which is manifested as menstrual cramps. It is called menstrual endometrium. 1) Proliferative phase: After menstruation, epithelial cells begin to proliferate from the ends of the endometrial glands and cover the surface of the uterine mucosa upward. On about the 5th to 9th day of the menstrual cycle, the endometrium is very thin, and the glands are scattered, sparse, and The glandular ducts are narrow and straight, and the glandular cavity surface is flat. On the 10th to 14th day of the menstrual cycle, the intima thickens and becomes corrugated, the glands and stroma proliferate significantly, and the number of glands increases. 2) Secretory phase: On the 15th to 19th day of menstruation, that is, 1 to 5 days after ovulation, the endometrium continues to thicken and the glands further enlarge and bend. Around the 20th to 24th day of the menstrual cycle, that is, 6 to 10 days after ovulation, the endometrium exhibits high secretion activity, and the bending and expansion of the glands reach their peak. In the late secretory stage, the thickness of the endometrium is approximately 5-6 mm. 3) Premenstrual period: approximately day 25-28 of the menstrual cycle, that is, 11-14 days after ovulation, which is equivalent to the regression phase of the corpus luteum. Glands and gland epithelial cells begin to shrink, degenerate, and secretions dry up, showing a phenomenon of exhaustion, with the thickness of the intima reduced by 1/5--1/3. 4-24 hours before the onset of menstruation, local spasmodic contraction of the intimal spiral arterioles occurs, causing ischemia and necrosis of the intima distal to the spasm. The permeability of the blood vessel wall increases, which in turn causes the blood vessels to dilate and blood to flow out of the broken vessels. 4) Menstrual period: Around the 1st to 4th day of the menstrual cycle, the main changes are the bleeding and shedding of the endometrium. Subsequently, the intima is repaired from the base, and new blood vessels grow from the severed ends of the blood vessels. The normal thickness of the endometrium varies at different stages of the menstrual cycle. The thickest endometrium is usually around 7-8 mm. Generally, it does not exceed 10 mm before menstruation. Before menstruation, the endometrium thickens due to the influence of the corpus luteum. After menstruation returns to normal, it is most appropriate to check the thickness of the endometrium at this time. A membrane of no less than 10mm will not affect fertility.