Ovarian morphology: All subjects will undergo a transvaginal ultrasound (TVUS) to obtain an antral follicle count at baseline, 8 and 16 weeks. The study investigator will image both the left and right adnexal areas in two planes, and make measurements of the transverse, longitudinal, and anteroposterior diameters of each ovary using electronic calipers on a Shimadzu SDU-450XL machine with a variable 4-8 mHz vaginal transducer. The examination of each adnexa will ensure an adequate opportunity to locate the organs. Inability to locate adnexa in this age group is less than 1% (internal data). All echo-free structures in the ovaries will be regarded as follicles. Follicles with a mean diameter (of two dimensions) between 2 and 10 mm will be counted. Calculation of all follicles (2-10mm), as well as those 2- 5mm, will be possible as these numbers will be recorded separately. The total between the two ovaries (2- 10mm) will be considered the AFC. The volume of each ovary will be calculated by measuring the three perpendicular diameters and applying the formula for an ellipsoid: (L x H x W x π/6). Data will be entered directly onto scannable datasheets. Examination will also determine whether cysts/other abnormalities exist and provide images to document number and type of abnormalities. Clinical alerts will be generated for ovarian cysts of greater than 3cm diameter or solid adnexal masses of any size. Dr. Huddleston will be responsible for relaying information about clinical alerts to patients and physicians.