The ovulated egg has oval spherical oocytes with outer wrapped zona pellucida and radial crowns, and the outermost radial crowns are radial in shape. Before ovulation, the follicle in the ovary is mature, with a diameter of about 18~25mm, and the oocyte inside is about 0.1mm at this time. When ovulation occurs, the oocyte inside the egg is discharged from the body together with the outer wrapped zona pellucida and radial crown. The oocyte itself appears ellipsoidal, and since the radial crown is wrapped around the outermost layer, the entire egg appears radial spherical. Since the egg itself is small, we can’t see the egg itself, but before and after ovulation, women can determine whether ovulation is occurring by observing the leukorrhea, or by consulting a doctor to check hormone levels, ultrasound, and so on.