Intracytoplasmic Morphologically Selected Sperm Injection (IMSI)

In IMSI, a high-power microscope is used to reveal structures in the head of sperm, called vacuoles, which have been shown to have a direct relationship with embryonic development: the larger the vacuole, the poorer the development. By unveiling these structures, IMSI enables embryologists to preferentially select those sperm with smaller vacuoles and reject those with larger ones to help promote sound embryonic development and all the benefits that come with it.