 The working hypothesis is that the administration of monophasic OCs prior to and during the time of physiologic selection of the dominant follicle will prevent the development of an ovulatory follicle selection occurs when the dominant follicle reaches 10mm Baerwald Pierson, unpublished data. In addition, we hypothesize that administration of OCs after selection of the dominant follicle, at more advanced stages of follicular development will result in 1 of 4 scenarios: 1. Ovulation of the dominant follicle, 2. Regression of the dominant follicle, 3. Formation of a Hemorrhagic Anovulatory follicle HAF or Luteinized Unruptured Follicle LUF, or 4. Formation of a follicular cyst. We hypothesize that atresia of dominant follicles and formation of anovulatory follicular structures will be associated with limited endometrial development. In testing these hypotheses, we will determine if OCs can safely and effectively be administered at any time during the follicular phase of the menstrual cycle. 