By Tarun Sai Lomte Reviewed by Susha Cheriyedath, M.Sc. Nov 13 2025 A nationwide Japanese cohort finds no evidence that cesarean delivery increases early-life risks of eczema, wheezing, asthma, or atopic dermatitis, challenging concerns that birth mode alone drives infant allergic disease. Study: Association of cesarean section with asthma and atopic dermatitis in infants from the Japan Environment and Children’s Study . Image Credit: Roman Fenton / Shutterstock In a recent study published in