A Follicle Tracking Scan, also known as an ovulation scan, is an ultrasound scan that is done during the menstrual cycle to track the development of ovarian follicles. It allows doctors to monitor the growth of follicles and identify when ovulation will occur. Some key points about Follicle Tracking Scans: They are typically performed starting a few days after a woman's period ends, and continuing every 2-3 days until ovulation is detected. The scans allow the doctor to see the follicles developing and measure their size. The scans track the dominant follicle, which is the follicle that will eventually rupture and release the egg at ovulation. The dominant follicle grows to around 20mm before ovulation. When the dominant follicle reaches around 18-20mm, ovulation is close. Usually ovulation occurs within 24-48 hours after the follicle reaches this size. The scans help pinpoint the day of ovulation so that the timing of intercourse or insemination can be planned appropriately, which improves the chances of conception. They are commonly used by fertility specialists to time intrauterine insemination (IUI) or in vitro fertilization (IVF) cycles. They are also sometimes used by women trying to conceive naturally. The scans are done transvaginally, with a probe inserted in the vagina. This allows clearer images of the ovaries and follicles. Follicle Tracking Scans use ultrasound to provide important information about the development of follicles in the ovaries, enabling ovulation to be precisely timed. This optimizes chances for conception.