Menstruation is 3-7 days clean, at this time it is not clinically necessary to monitor ovulation, which is done from the 12th day of menstruation. If you have an ultrasound, you should have a vaginal ultrasound on the 12th day of your period to find out if there are follicles in your ovaries, and then have another ultrasound on the 14th and 16th day of your period to find out the development of the follicles and to find out if the follicles rupture and expel the eggs, so that you can know if there is ovulation. If you use ovulation test strips to monitor, clinically it is done on the 12th day of menstruation and the urine is used around 10:00 a.m. Therefore, it is not suitable to do ovulation monitoring when you have your period, either by ultrasound or by ovulation test strips.