I did a search using different key words and could not come up with anything specific.
From my viewpoint only, I would just recommend a good multi-vit. and mineral supplement. If your older additional b group vits and zinc will help.
Also, I am not exactly sure what your idea of "fertility" is. If you are talking about a man or womans ability to have a baby there are thousands of pages on the problems and causes of problems in that area.
Anyway, good luck..
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