1. Steps of follicle monitoring Follicle monitoring is performed during a specific time period in a woman’s menstrual cycle to determine the optimal ovulation time by detecting the size and number of follicles. The following are the steps of follicle monitoring: Step 1: Ultrasound detection This is one of the main steps of follicle monitoring. Through ultrasound examination, doctors can discover the number and size of follicles in a woman\’s ovaries and determine the best time for ovulation. This test is usually done on days 5 to 7 of the menstrual cycle