It makes sense because the fetus, if it is already prone to allergies, is having the immune system aggravated every single day by the offending foods. It's like if you have hay fever and go mow the grass every day. And as far as evolution goes, humans did not always have the onslaught of pollution, chemicals, hormone-laced foods, immunizations, and other nasties to weaken the immune system. There were other nasties (black plague, smallpox, etc.), but I think the bad things now are really, really weakening immune systems. And also, in world history, the super allergenic foods were never eaten in the quantities in which they are eaten now in the west. They were too expensive and not as available. There is certainly more availability of these foods now. But anyway, it is not my intention to start a debate. But three very prominent allergists I have seen for my daughter also support avoiding allergenic foods during pregnancy if a sibling has allergies. Or even if a sibling does not. Just everything in moderation. And the eggs and dairy I had in my first pregnancy, that was not moderation.

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