How big can a follicle grow in 5 days?

Patient's question:

No

Doctor's answer:

Oocytes generally begin to grow and develop on the first day of the menstrual cycle. If the menstrual cycle is regular and normal, the follicle grows at a rate of about 0.1 cm per day. Generally, a follicle needs to reach a size of 18-25 mm to be considered a healthy and mature egg.