Infants acquire immunoglobulins through two primary sources:
1. Placental Transfer: During pregnancy, maternal IgG antibodies cross the placenta, providing the newborn with passive immunity. This protection is temporary and usually lasts for the first few months of life. 2. Breastfeeding: Breast milk, particularly colostrum, is rich in IgA antibodies. These antibodies help protect the infant's gastrointestinal tract from infections.
