The number of follicles in a normal woman is usually within 10 per month. The follicles can be divided into three categories: primordial follicles, growing follicles and mature follicles, and each woman’s primordial follicles are basically fixed and inherent, and there are generally about 40,000 primordial follicles by puberty, while each woman will generally have no more than ten follicles growing in the first half of each menstrual cycle, but the follicles will shrink differently during the growth process, which is commonly known as atretic follicles, and Each woman generally has only one follicle growing to maturity before ovulation, which is commonly known as the dominant follicle, which is about 16mm to 20mm in size, and such follicles are good for pregnancy if you have sex after ovulation, and very few women can have two dominant follicles at the same time, and such women will have twins if they conceive. In addition, some women may have more than 10 smaller follicles in their ovaries during follicle monitoring or ultrasound during menstrual disorders. This is not normal and is mostly seen in patients with polycystic ovary syndrome, suggesting ovulation disorders, no dominant follicle growth and too many small follicles. In conclusion, the number of follicles in a normal female menstrual cycle is usually within 10 and no more than 10, and most of the follicles that eventually develop to maturity are one, with a few women having two mature follicles.