This study will provide evidence to support ultrasound evaluation as a non-invasive marker of ovarian aging. This and the genetic testing may lead to an opportunity for prospective identification of patients at risk for early decline in ovarian function. The ability to accurately generate and share this type of information will allow women to become proactive in managing their fertility as well as to better understand their risks associated with reproductive aging. The recruitment of a large, population-based cohort will increase the generalizability of the data generated. The ethnic diversity of this population will allow multiple comparisons to identify true "risk factors" for early, and/or accelerated, ovarian aging and their correlation with ethnicity.