过敏有一定的遗传性,父母一方有过敏体质的其子女过敏发生率20%~40%;父母均为过敏体质,其子女过敏体质的机率在40%~80%,即便父母均不过敏,子女过敏发生率也有5%~15%。因此爸爸妈妈们决不能掉以轻心。宝宝出生后最初1~2年,免疫系统发育尚不成熟;同时,婴儿肠道功能发育不够成熟,大分子过敏原容易通过肠黏膜而引起过敏 Allergy has a certain degree of hereditary, parents allergy to one of their children allergic to the incidence of 20% to 40%; parents are allergic, their children allergic physical probability of 40% to 80%, even if both parents are not allergic, children The incidence of allergy is also 5% to 15%. Therefore, mothers and fathers must not be taken lightly. Baby after the first 1 to 2 years after birth, immune system development is not yet mature; the same time, infant intestinal function is not mature enough, macromolecules allergen easily lead to allergies through the intestinal mucosa