Male: Boys do not produce sperm until puberty, so a male infant's reproductive system is largely unchanged ... which are hollow balls of cells, each with an immature egg (or ovum) in the center.

If an egg is waiting, they might fertilise it and when that happens, the cells begin to divide and multiply and eventually become a fetus. The function of the male reproductive system is to ...

(d) “Female” means a person belonging, at conception, to the sex that produces the large reproductive cell. (e) “Male” means ...

Gametes are an organism's reproductive cells. They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells ...

Testicular cancer is when abnormal cells in a testicle start to divide and grow in an uncontrolled way. The testicles are part of the male reproductive system. The testicles are two small oval shaped ...

The remaining male pup developed into a fertile ... demonstrate that cloning using adult somatic cells is not restricted to female or reproductive cells. Thus, it should be possible to 'store ...