#EconSky Suprisingly, it has a small negative effect on the probability of a caesarean section and of an induction of labour. IVF and other assisted reproduction methods are responsible for an increasing share of births. However, identifying the effects of such methods on 2/n

on the mother and the child remains a challenge, as IVF-use strongly correlates with predictors of adverse obstetric outcomes, such as advanced maternal age. The best available tool is sibling analysis, comparing siblings conceived spontaneously with siblings born via IVF. 3/n