Prevention of Cow's Milk Allergy in Children

Inclusion Criteria: * mother before the 5th month of pregnancy * mother agreeing to stop consumption of yogurts and fermented milks during the 3rd quarter of pregnancy * mother agreeing to receive a calcium supplementation during the 3rd quarter of pregnancy * atopic mother or father and at least another atopic member (sister or brother) * parents having given written informed consent * adhesion to eviction regimen for mother and child * parents agreeing with a regular follow-up (3 visits and monthly phone call with the dietician) Exclusion Criteria: * mother in an exclusion period from another study * parents refusing to sign the informed consent * infant in a situation which could interfere with an optimal participation to the study, or which could represent a risk for the infant, according to the investigator * known or suspected immunodeficiency in the family