Germ cells

Germ cells are embryonic precursors that differentiate to produce male and female gametes that are carried in the sperm and unfertilized eggs to undergo fertilisation. Germ cells are retains their pluripotentency Template:Pluripotent cells have the ability to develop into all types of body cells, but lose the ability to becomes cells that make up the placenta.. Therefore, they can differentiate and give rise to an individual's unique character.

Errors in germ cell differentiation can lead to infertility. 

Reference

T. Schedl. Encyclopedia of Genetics, Germ Cell. 2003 December [cited 2017 December]; Volume null (Issue null): 873-876p. Available from https://www.sciencedirect.com/science/article/pii/B0122270800005632