To evaluate the impact of two FDA approved culture media on potential of human embryos resulting from IVF (sequential & monophasic media). Half of each patient's embryos will be randomly assigned to grow in monophasic media & the other half in sequential media. All embryos will undergo Comprehensive Chromosome Screening (CCS) & the best euploid embryo from each group will be transferred resulting in a double embryo transfer (DET). If there are only euploid embryos from one group, patient will have single embryo transfer (SET)(fresh or frozen).

Inclusion Criteria:

• Patient undergoing IVF/CCS (no PGD banking)
• Patient meets ASRM guidelines for Double Embryo Transfer (DET)
• Donor Sperm OK
• AMH ≥ 1.2
• FSH ≤ 12
• BAFC ≥12
• Max 1 prior failed IVF cycle for patients 35-45 years old
• Patient <35 years old MUST have 1 prior failed IVF cycle

Exclusion Criteria:

• Chronic endometrial insufficiency
• Use of oocyte donor or gestational carriers
• Medical contraindications to Double Embryo Transfer (DET)
• Male Factor (<100,000 sperm or surgical sperm)
• Communicating hydrosalpinx (on HSG)
• Single gene disorders or sex selection