Follicle size on the first day of ovulation

Generally speaking, on the first day of ovulation, a certain number of eggs have been produced in the ovaries, but they are not yet mature. It takes some time for these eggs to mature and be released from the ovary. Therefore, the follicle size on the first day of ovulation is usually smaller, about 1.0 mm.

However, for some women, they may release a larger egg on the first day of ovulation. This is often related to changes in hormone levels in their bodies, such as hormone therapy or medication. In this case, the follicle size on the first day of ovulation may reach more than 1.5mm.

In addition to follicle size on the first day of ovulation, there are other factors that affect a woman's fertility. For example, a woman’s age, height, weight, health status, and reproductive tract obstruction. Therefore, if you want to know your fertility, it is recommended to consult a doctor and conduct a comprehensive physical examination.