This will be a randomized controlled trial involving good prognosis infertility patients undergoing in vitro fertilization (IVF) +/- intracytoplasmic sperm injection (ICSI). Good prognosis is defined as: age <35 years, 1st IVF or IVF/ICSI cycle, normal ovarian reserve parameters (antral follicle count (AFC) >12, antimullerian hormone (AMH) > 15 pmol/L, cycle day 3 follicle stimulating hormone (FSH) < 10 IU), primarily tubal factor/male factor with ejaculated sperm or unexplained infertility, who achieve 3 or more high quality blastocysts (adequate quality for either fresh embryo transfer or cryopreservation by 5 days post-oocyte-retrieval).