Your in vitro fertilization (IVF) cycle has failed, and you do not know why. You had diligently followed your IVF protocol, had several eggs successfully retrieved and fertilized, then screened the embryos for chromosomal abnormalities and had at least one normal embryo. You also have no anatomical anomalies, your uterine lining was triple-layered and thick enough, and the embryo transfer procedure had gone smoothly. Still, your pregnancy test came out negative. What do you do? Repeat the same steps and hope for better luck? If the answer is yes, you might also want to consider endometrial scratching. It could help tilt the scales in the other direction.