A follicle study is an examination of the ovarian follicles, which are small pieces of tissue that contain and release eggs. Follicle studies are typically performed via ultrasound. A picture is taken of the internal organs and the results are analyzed.
During a typical follicle study, a probe is placed inside the vagina. The probe releases sound waves that are used to form a picture of the internal organs, with special emphasis on the development of the follicles and the thickness of the endometrial lining, a special tissue inside the uterus to which an embryo attaches itself. A thick endometrial lining and mature follicles ready to release eggs are good indicators of fertility.