My husband has hay fever and our first two kids suffer from it. what can i do to avoid this happening to the baby in my womb?

Genetic & exposures: The tendency is mostly genetically determined, but environmental exposures and for at least asthma certain viral infections seem to play a role. The problem is that the environmental factors are variable and confusing, nor can we say that a particular action, although statistically trending is effective in one individual. Check with your "family" allergist for specifics and enjoy your new addition.

Maybe breastfeeding: There isn't any good evidence that there's anything you should be doing while pregnant. There is some evidence that exclusive breastfeeding (ebf) for the first 3-4 months reduces the chances of eczema in kids (dermatitis). The evidence that ebf reduces asthma or hayfever (allergic rhinitis) is weaker - if there is a protective effect it's small so don't worry if you choose not to or can't ebf.

Breast feed: Slow food introduction help decrease atopic diseases like hayfever and asthma. So breast feed as long as 1 year.

Nothing: Allergy or hay fever depends on two things: genetics and environment. You cannot change the genetics of you baby and there is no evidence that the foods you eat will impact whether or not you baby will have allergies. There is evidence that reducing dust, mold and pollen in the home will reduce the chance of developing allergies to these items so keep the air in your home clean.