Double-headed sperm are non-viable. They are unable to fertilize the egg and result in viable embryos. Thus, they are always dismissed in IVF cycles. When a sperm has two heads, the genetic material is also duplicated, which results in triploid embryos. When this happens, embryonic arrest occurs a few days following fertilization anyway.
Suggested for you: What Types of Sperm Morphological Defects Exist?.