Studies have shown that semen samples with greater than 14% normal morphology yield a high fertilization rate and those with less than 4% normal forms result in very low fertilization, therefore we believe that a sperm cell must have a normal oval shape (and motile, of course) to fertilize an egg when performing conventional IVF insemination.

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One of the steps involved in ICSI is picking up a single sperm cell to inject into the egg. 

High-Definition ICSI is the use of a very high magnification objective lens when selecting a motile sperm for ICSI in order to ensure that we are selecting a sperm cell with a normal oval form and with no other deformities. Higher-quality embryos are usually attained when morphologically normal sperm cells are used to fertilize the eggs.