Earlier routine induction of labor—Consequences on mother and child morbidity
利用丹麦2011年产科指南变更这一自然实验，发现早期常规引产使母亲后续引产风险增加32%-38%，但母婴短期和中期发病率基本不受影响。
A growing number of birth interventions had led to a concern for potential health consequences. This study investigates the consequences of earlier routine labor induction. It exploits a natural experiment caused by the introduction of new Danish obstetric guidelines in 2011. Consequently, routine labor induction was moved forward from 14 to 10-13 days past the expected due date (EDD) and extended antenatal surveillance was introduced from 7 days past the EDD. Using administrative data, I find that affected mothers on average had a 9-11 percentage points (32%-38%) higher risk of being induced the following years. Yet, mother and child short- and medium-term morbidity were largely unaffected.