Newly discovered sperm movement could help diagnose, treat male infertility

Newly Discovered Sperm Movement Could Help Treat Male Infertility

Why do some animals have sperm 20 times the length of their bodies?

Scientists created a database on sperm length from 21 different animal groups. The scientists found that the mode of fertilization impacts the evolution of sperm length, helping us better understand this essential ingredient for much of animal — and human — life.