The Follicular Monitoring technique involves serially monitoring ovarian follicles with ultrasound in order to determine whether their maturation is complete. It is useful for assessing the size of follicles that support growing eggs and for determining the thickness of uterine linings.
The monitoring of follicles is essential for assessing the effectiveness of fertility medications in women. For safety, it is crucial to know how many eggs will ovulate and how high the estradiol level is. Each mature egg produces about 150-200 pg/ml of estradiol. Therefore, using a woman’s hormone levels along with an ultrasound exam helps determine her response to treatment.
Follicular studies are done with ultrasound transvaginally, taking pictures of internal organs and evaluating ovarian follicles. The scans are conducted by inserting a small probe into the vaginal canal. A doctor will be able to predict the approximate time when the egg will be released, and a couple can plan their intercourse around that time to maximize their chances of conception. To determine when a patient is likely to ovulate, tissue containing eggs and the thickness of the endometrial lining are evaluated.