30 min: It has been estimated that the fastest swimming sperm can reach the egg in about 30 minutes (michael phelps?). On the other hand, conception can occur as many as five days after sex or possibly longer, as strong, healthy sperm can survive for about that many days (and perhaps even longer) in the supportive environment of the fallopian tubes as they wait for an egg to be released, if not already.
Answered 5/7/2014
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