What is the shape of the follicle?

Follicles have certain shapes, and most of our follicles should be oval. If some other shapes appear, it is actually an abnormal situation. This situation should be taken seriously, otherwise it will lead to many problems. In addition to the shape requirements, the size of the follicle also has a certain range. So what is the shape of the follicle?

Structurally, the egg discharged from the mature follicle is about 20 mm in size and is surrounded by many granulosa cells. These granulosa cells are arranged radially in the outermost layer of the egg cell, so it is also called the radiate corona. Inward, there are the zona pellucida, the extravitelline cavity, and the vitelline membrane.

Eggs are produced in the female reproductive organ, the ovaries. When a woman is born, there are 100,000 to 500,000 primary follicles in each ovary. They are surrounded by a layer of primordial follicle cells, also known as granulosa cells, and a layer of basement membrane outside them. These primordial follicles grow in batches every moment throughout a woman's life, but more than 99% of them wither and degenerate into atretic follicles shortly after they begin to develop. During the reproductive period, only a few hundred follicles fully mature and release mature eggs.

During the reproductive period, there is usually a mature follicle that grows to a diameter of 18-25mm in about a month. Ovulation occurs in the middle of the menstrual cycle, about fourteen days before the next menstruation. The eggs are discharged alternately from the two ovaries or continuously from one side. The egg can survive for 1-2 days after ovulation. Once it combines with sperm during this period, it will create a new life. If it does not combine with sperm, the egg will degenerate and disintegrate and lose its ability to be fertilized.

Generally speaking, it is normal for an egg to develop to 18-25mm. Women only release one mature egg every month, and the size of a mature egg is generally over 20mm. The egg will be released when it matures, but there are individual differences: some people will release the egg when the egg grows to 15mm, while others will release the egg when it grows to 25mm.

Ultrasound monitoring shows that the largest follicle appears on the 10th to 16th day of menstruation. The follicle is 20mm in diameter, round in shape, with thin walls, protruding to one side of the ovary, and has good internal sound transmission. Ovulation usually occurs within 10 hours, and ovulation is more common on the 12th to 18th day of menstruation, and a few occur on the 20th to 30th day.

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