I didn't believe that delaying introduction of allergenic foods was the way to go so I introduced eggs, milk, sesame and nuts from 6-8 months.
We have no food allergies in the family but we do have history of eczema, hayfever, asthma etc which are also risk factors. My DS gets mild eczema and he showed signs of hayfever so I was careful and alert when introducing these foods. For some reason I avoided peanuts and as it turns out my DS is anaphylactic to peanuts. We found this out at 14 months when my DH gave DS a little bit of his peanut butter toast.
Next time I still won't delay these foods but I will be very cautious when introducing them especially if the next child also has eczema. By that I just mean watching carefully for a reaction.