With cysteamine pre-treatment, decreased yields of dominant lethals were obtained in spermatocytes, spermatids and in spermatozoa . 用半脘氨预先处理，在精母细胞，精子细胞和精虫内均可使显性致死突变值下降。
Smoking can damage the sperm and decreases fertility 吸烟损伤精子，较低生育力。
We didn ' t destroy all of your sperm two years ago 两年前我们没有完全破坏你的精子
Influence of bisphenol a on spermatogenesis in wistar rats 大鼠精子生成的影响
Conception occurs when a sperm fertilizes the egg 当精子使卵子受精时便产生受孕。
Q . how does a guy know if he has a high sperm count 一个男人怎么知道他的精子数？
Just announced their intention to fertilize an egg 刚刚声明他们希望不用精子细胞
