The study will be an observational study using discarded material from patients undergoing IVF treatment. On the day of ovum pick up, the fluid aspirated from the first follicle in each ovary will be saved and analyzed for cellular content by fluorescence-activated cell sorter (FACS) analysis and cytokine and hormone by Enzyme-linked immunosorbent assay (ELISA) and quantitative polymerase chain reaction (qPCR). In addition, a total of 5cc of blood will be drawn from the patient when introducing the intravenous line for analysis of immune cell composition,hormones and cytokine levels. During the whole study number of oocytes retrieved,number of mature oocytes,number of fertilizations,implantation rates and clinical pregnancy rates will be documented as well.