What is the normal size of an ovarian follicle? Authoritative experts are here to answer!

Ovulation for women is a complex physiological process. The follicles need to mature before they can be discharged smoothly. However, experts say that the normal size of follicles for each woman is different, which is closely related to the individual's physical condition. But as long as the size is within a certain range, it is considered normal. The following will introduce you to the relevant knowledge about female follicles.

1. Normal range of follicle size

The size of the follicle when ovulation occurs depends on the individual. Some ovulate when the follicle grows to 15mm, while others need it to grow to 25mm. Follicular development is a continuous process, and the normal follicle diameter should be between 18-25mm.

The growth from primary follicle to mature follicle can be divided into 8 levels. It takes a total of 10 days from the 6th level follicle to the 8th level follicle, which is exactly the follicular phase in a menstrual cycle. Starting from 16mm, after another 2-3 days, it will develop into a 20mm follicle and then be discharged.

2. How big is the follicle for pregnancy?

Conception is a complex physiological process that requires the following conditions:

1. The ovaries release normal eggs, and the semen is normal and contains normal sperm;

2. The egg and sperm can meet and combine in the fallopian tube to form a fertilized egg, which is then smoothly transported into the uterine cavity;

3. The endometrium is fully prepared for the implantation of the fertilized egg.

How big does the follicle need to be to achieve pregnancy? Under normal circumstances, the development of follicles to 1.8-2.5cm is within the normal range. If the follicles are immature or mature but cannot be discharged, conception is impossible. Most of the characteristics of mature follicles can be monitored through B-ultrasound.

3. What is the normal size of follicles?

Normally, the egg cannot be seen before ovulation because it is very small. Only when it develops into a follicle can it be seen under a microscope, when it is already very large. The 10th to 14th day before menstruation is called the ovulation period.

A mature egg is generally larger than 20mm, and the smallest one is normal at more than 18mm. The growth from primary follicle to mature follicle can be divided into 8 levels. The first five levels are too small and take too long to grow, so they do not have much practical significance. The focus begins from level 6. The diameter of the level 6 follicle is 5mm; after 5 days, it grows to 10mm and becomes the level 7 follicle; after another 5 days of development, it reaches the level 8 follicle with a diameter of 16mm. The 8th level follicles are mature follicles.

Therefore, it takes a total of 10 days for the 6th level follicle to grow to the 8th level follicle, which is exactly the follicular phase in a menstrual cycle. Starting from 16mm, after another 2-3 days, it will develop into a 20mm follicle and the egg will be released.

The size of the follicles has a great impact on whether the follicle development is normal. If the follicle size is not standard and does not reach the normal value, it will affect normal ovulation or the quality of the discharged eggs will be poor, affecting normal conception.