Female germ line development

In the systems that have been studied, it can be seen that cells destined to become the female germ line are identified and set aside very early in development. In the female, these cells will go on to form the eggs, and will contain the mitochondria that will pass to the next generation. When one of these eggs is fertilised, the cells that will form the gametes for the next generation are set aside, and so on. 

Vaccines that are expected to affect physiological processes related to fertility, pregnancy, or fetal development would require various further studies regarding the vaccine s reproductive toxicology. The same applies if alterations to male or female germ-line cells would be detected... 

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