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Sperm life depends on the conditions the sperm is in. Sperm need moisture and warmth to survive. Sperm can survive for up to five days in sperm-friendly cervical mucus which helps protect the sperm and keeps it alive, plus it makes it easier for the sperm to reach the egg, should it be present. In liquid nitrogen (so at a temperature of -196C), sperm can survive for decades.
The life span of sperm after ejaculation depends on the circumstances. Ejaculated sperm remain viable for several days within the female reproductive tract. Fertilization is possible as long as the sperm remain alive — up to five days. Sperm can also be preserved for decades when semen is frozen.
Fertilization is possible as long as the sperm remain alive — up to five days. Sperm can also be preserved for decades when semen is frozen.