Authors' Reply To Erren And Colleagues

We appreciate Erren and colleagues’ response to our recently published paper, suggesting we examine photoperiod (hours of daylight).12\n\nA fundamental question in health remains whether fetal adaptations in response to adverse intrauterine conditions increase the risk of childhood and adulthood disease.3 Barker and colleagues’ observation that birth weight predicts future risk of ischaemic heart disease4 has received renewed attention through the potential impact of early life environments, such as nutritional status and …