Guleria S, Kjær SK, Duun-Henriksen AK, et al. - This cohort study was undertaken to determine if maternal use of fertility treatment was correlated with febrile seizures in children. All liveborn children in Denmark in 1996-2012 (n = 1,065,901) were related to the Danish Infertility Cohort and the Danish national registers and tracked from one year of age until the first episode of a febrile seizure, death, emigration, loss to follow-up, or end of follow-up (December 2015). Nearly 16% of children (n = 172,140) were conceived by infertile women, and about 3% (n = 34,082) were diagnosed with febrile seizures during follow-up. The relative risk for febrile seizures had been slightly increased for children conceived after fertility treatment. The associations were unchanged as children naturally conceived by infertile women were used as the reference group.