Follicle criteria on day 12 of menstruation

On the twelfth day of menstruation, the follicle development standard should be detected. At this time, the follicle size should be about 18 mm. With the increase of estrogen, under the action of hormone, the follicle will continue to develop continuously. Generally, the diameter can reach 18~23 mm. Finally, the follicle ruptures and discharges eggs. It is recommended to check the follicle every day and pay close attention to the follicle development.