Hindi naman totally bawal, pero maraming preggy moms ang nag-aalinlangan talaga sa pinya at grapes kasi sabi nila may risk of miscarriage, honestly, a few of us talked about this and most played it safe lang, especially during the first trimester. Best to ask your OB kung okay lang for you specifically based sa pregnancy mo, kasi bawat case is different, pero kung gusto mo talagang kumain, better safe than sorry talaga.