Personally.. while i do not find vegan's repulsive.. i find some quite beautiful... but i would never have offspring with them. It is known in every traditional culture that certain vitamins only obtained from meat, especially A and D ensure optimal fertility... and healthy offspring. The foods widely known to ensure fertility for example are like eggs (especially the yolk) fish roe (eggs) , liver, butter from cows feeding off green grass etc....

What you eat affects the health of your children.. and as such I would not put a child in such jeopardy

And yes i know beta carotene is claimed to be as good as vitamin A but it is just not so

And vitamin D comes from sunshine etc..

Look at the weston price site for more info