On which day of the menstrual cycle should an ultrasound be performed to check the size of the uterus, the thickness of the endometrium, and the size of the ovaries?

Patient's question:

No

Doctor's answer:

Hello, on day 12 of the menstrual cycle, an egg follicle size of 1510mm was detected. The follicle grew rapidly in the days leading up to ovulation. Based on your follicle size, it is expected that the follicle will be released in 3 to 4 days. You should increase the frequency of monitoring in these days.