Figure 1

Ultrasonograms of ovarian follicles, showing a dominant anovulatory follicle (6 mm) in its static phase (on the left) and an ovulatory follicle (12 mm) a day before ovulation (on the right).
Ultrasonograms of ovarian follicles, showing a dominant anovulatory follicle (6 mm) in its static phase (on the left) and an ovulatory follicle (12 mm) a day before ovulation (on the right).