MEDICAL THEORY: Spermacide and Egg In Ovary Death...

See below...

My theory is this: you should probably use a condom AND female counter-pregnancy drugs to prevent unwanted birth.  A condom with spermacide would help if there is a defect or misuse or rupture, but who trusts anything that would kill an egg?

I think that it is possible that pregnancy prevention with spermacide kills the eggs in the ovaries, something we could probably check with a surgical procedure.  This could be the reason for women needing fertility care, well the primary one.  

Be careful, and be wise!