Can taking probiotics during pregnancy improve the immunity of pregnant women? Yes, it is necessary for pregnant women to take probiotic supplements during pregnancy. The largest immune organ in the human body is actually the intestine. When the intestines are abnormal, immunity will decrease. Probiotics entering the intestines can form a protective barrier to prevent harmful bacteria from growing. It would be more professional if it was the kind of pregnancy probiotics that Xi Mengyao and Lu Jingshan were taking during pregnancy, Perdays, right?