Microinjection is an option of embryo transfer technique applied for patients who are suitable for in vitro fertilization (IVF) due to insufficient count of motile sperm, which cannot penetrate the egg and causes repeated failure of fertilization. With this procedure, the sperm is injected into an egg to facilitate the fertilization.
Intracytoplasmic Sperm Injection (ICSI) is a microinjection method characterized by the microinjection of a single sperm into the egg.
Intracytoplasmic morphologically selected sperm injection (IMSI) is another microinjection method characterized by the microinjection of the sperm selected under a high-magnification digital imaging microscope, into the egg. This method is better than ICSI procedure due to improved embryo development in the treatment of infertility, especially resulting from male factors.