Follicular study and monitoring are done to study ovarian follicles that are used to identify the ovulation of eggs. It begins around days 7 – 9 from your last menstrual period (LMP). It is useful in measuring the size of the follicles which need to reach between 18-24mm for an ovulation to occur. It also helps to assess the thickness of the endometrium (lining of the womb) which needs to be 7mm or above for a pregnancy to implant. The entire scan enables to the monitoring of the growth of the follicles, and approximate rupture period of follicles and hence can predict the ovulation period, which can help time the intercourse to maximize conception. The scan is ideally performed transvaginally as it gives much clearer images and a full bladder is not required.