This paper examines the health effects of Caesarean section (CS) for children and their
mothers. We use exogenous variation in the probability of CS in a fuzzy regression discontinuity design. Using administrative Danish data, we exploit an information shock for obstetricians that sharply altered CS rates for breech babies. We find that CS decreases the baby’s probability of having a low APGAR score and decreases the number of family doctor visits. We find no significant effects for severe neonatal morbidity or hospitalizations. Similarly, we find no effects of CS for the mothers in terms of post-birth complications or infections.