They may also have an allergy or intolerance to something in their food. (checkpregnancy.com)
Possibly the problem is a result of a food intolerance to something that the mother is eating. (verywellfamily.com)
I have looked this test up and could it be that these items showed up as us having such a high intolerance to them because we would have had them in our system from consuming them so regularly? (maryvancenc.com)