And I totally agree with this!! When I was at school, nut allergies were so rare!! Now, it's so common that most schools are 'nut free'. No offence to those parents with children with nut allegies, but seriously WTF?! That just wasn't an issue when I was young!! I think all these studies are causing more allergies than preventing them.
Sorry but I tend to disagree. Something is causing the nut allergies, and I doubt it can be blamed on abstinence from nuts in pregnancy? As we were only advised to be abstinent after the nut allegies increased by so much...
Look at the difference in food products that are consumed these days as opposed to what our parents ate. Soo many foods are laced with nuts or may contain traces. There's a theory that the western world is becoming so allergic to nuts because of the way they are processed in our foods, and then recognized by our immune systems as intruders- hence building up an allergic response. Interestingly other societies don't suffer peanut allergies anything like western society- possibly due to their use of the food being entirely different & not processed, etc.

Wrt to the 'nut free zones' at schools, did you know some children can go into anaphylactic shock and die if they even smell or touch a single microscopic nut particle? I can entirely understand and support why there would be nut free zones. I can't see how the nut free zones are contributing to allergies? We're not talking about a minor inconvenience that kids can't take peanut butter sandwiches to school. We're talking about the fact that other children can, and have died because of peanut butter sandwiches. And sure it was unheard of when we were kids ourselves, but things have changed, and sadly I doubt it will ever revert back to our childhood peanut freedom again?

I remember reading an article very recently which disputes the delaying of nut exposure- & suggests that exposing kids to potential allergens earlier in life rather than later may actually improve allergy outcomes, but they excluded pregnacy from their recommendations. So the info out there is just ridiculously conflicting.
It's obvious that even the most highly skilled immunologists don't have all the answers, which doesn't help any of us here!
But my personal choice would be to err on the side of caution. I don't think it's true that in pg we are told we aren't allowed to do/eat anything. Peanuts and listeria are the only things I remember being cautioned about...