The follicle is the place where the eggs are laid. Only when the egg is released smoothly and combined with the sperm can it be implanted smoothly, and a woman will become pregnant, but if the follicle is not mature, the egg is If it cannot be excreted, the woman will not be able to get pregnant at this time. Today, Xiaobian will tell you about the growth of follicles and how follicles ovulate.
How do follicles grow?
The normal growth of follicles is controlled by the ovaries, reproductive Complex functional effects of the axis, central nervous system, and endocrine system. According to the morphological and functional changes during follicle development, it can be divided into three stages: primordial (primary) follicles, growing follicles and mature follicles.
In each menstrual cycle (counted from the first day of bleeding), the ovaries collect 3 to 11 antral follicles (15mm); others stop growing and regress For atretic follicles. The mature dominant follicle grows rapidly, and when the diameter reaches 18~20mm, it gradually moves to the surface of the ovary to prepare for ovulation.
Which follicle is more likely to be fertilized?
Mature eggs are generally more than 20mm in size, The smallest is normal if it is above 18mm. Starting from 16mm, after 2-3 days, it will develop into a 20mm follicle, and the egg will be released. The follicles are round or oval in shape, with a diameter of 18-25mm, which is lower or larger than the normal size of the follicle, which will affect normal ovulation. The shape is plump, round or oval, and the inner wall is thin and clear. Such “good follicles” are more likely to be fertilized after ovulation.
Follicles are like seeds, they are full and round. If the difference between the two diameters of the follicles is ≥3mm, it is called flat follicles. If the B-ultrasound shows 15mm×
20mm, the follicle quality is poor. In addition, if multiple follicles develop in one ovary at the same time, but there is no obvious dominant follicle, it may be caused by endocrine disorders, such as polycystic ovary syndrome. In the end, this situation will only lead to which follicles grow small and grow poorly, making it difficult to ovulate and conceive normally.
When can I perform B-ultrasound surveillance?
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Ovulation is measured on the 13th day of the menstrual period. If the dominant follicle is not detected, it can be monitored every day after the 13th day (usually an experienced ultrasound doctor will recommend an interval of 1 or 2 days to the patient based on the size of the follicle measured on that day. monitoring again).
The follicles grow at a rate of 2mm every day. Generally, the follicles in the ovulation period are the largest and grow to 19-20mm, and they will ovulate within 24 hours.
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