IMSI is a new IVF technology that enables the embryologist to magnify sperm up to 6000 times versus the standard magnification of 400 times. By increasing the magnification, embryologists are able to increase the rate of fertilization by selecting the sperm with the best morphology—one indication of the best sperm quality. With standard methods, important details such as empty spaces in sperm and details of the shape and smoothness of the nucleus of the sperm go undetected. Studies have found that IMSI improves the success of IVF-ICSI