The Human Sperm Travels at Between 1 & 4 Millimetres a Minute. They're so Small It Takes Them From 45 Minutes to 3 Days to Travel Their 175mm Journey.
The Human Sperm Travels at Between 1 & 4 Millimetres a Minute. They're so Small It Takes Them From 45 Minutes to 3 Days to Travel Their 175mm Journey.