NHS has a whole guide on foods to be avoided advised not to eat too much tuna or oily fish Which foods should I avoid during pregnancy? not to eat too much tuna or oily fish not to eat too much tuna or oily fish Why should I avoid some foods during pregnancy Why should I avoid some foods during pregnancy? not to eat too much tuna or oily fish not to eat too much tuna or oily fish NHS NHS has a whole guide on foods to be avoided NHS also recommends NHS has a whole guide on foods to be avoided Which foods should I avoid during pregnancy?