General Information This study at Stanford medical center will verify the safety & efficacy of the novel Previvo Genetics Uterus Lavage device and document subject comfort level during the procedure - equivalent to insertion of an IUD You Might Be Eligible If You Are: • A female between the ages of 21 and 35 • In good general health • Having regular periods • Are not pregnant or planning on becoming pregnant Study Participation Involves • Three clinic visits including physical examination to determine eligibility, uterus lavage procedure if eligible, ultrasound and blood draw at final visit • Enrolled participants will receive up to 500 USD For more information please contact Oshra Sedan Study Coordinator osedan@stanford .edu