Fertile, healthy sperm are defined not just by the number of sperm (or count), but also by sperm concentration, by sperm motility and speed, and by healthy morphology (sperm shape and size).

• 健康精子的定义不仅仅是精子的数目,还有精子浓度,活动量和速度,及健康的形态（精子的形状和大小）。