IL13 and allergic asthma: Maternal serum in the MAA dams showed elevated levels of the T-helper type 2 allergic asthma-associated cytokines, including IL-4 (p = 0.019), IL-5 (p = 0.0004), and IL-13 (p = 0.003) [34,35,36], confirming an allergic asthma response.