Will my baby develop an allergy if I don't give it regularly?

Here's a straightforward answer: Whether an allergy develops isn't about giving it regularly; it has nothing to do with how often or how often you introduce the allergen. What matters is how your baby's immune system reacts to that food.

Giving it once and forgetting it doesn't create an "allergy development" risk — because if an allergy exists, it can show up on the first try, and if it doesn't, skipping meals won't make it appear. Research shows that giving allergens regularly (2-3 times a week) protects existing tolerance — meaning it prevents an allergy that already exists from getting worse, not that allergy DEVELOPS; it maintains tolerance in a baby who already tolerates that food. In other words: if your baby tolerates a food, keep giving it 1-2 times a week to keep that tolerance strong. But giving it once and stopping doesn't "cause an allergy."

No need to worry — you just want to continue, and if you've seen your baby do well with an allergen, aim to include it in meals about once or twice a week going forward so that tolerance stays solid.