Background During the past 25 years, many pregnancy and birth cohorts have been
established. Each cohort provides unique opportunities for examining associations of early …

Early life stages are vulnerable to environmental hazards and present important windows of
opportunity for lifelong disease prevention. This makes early life a relevant starting point for …

Self‐selection in epidemiological studies may introduce selection bias and influence the
validity of study results. To evaluate potential bias due to self‐selection in a large …

Early life is an important window of opportunity to improve health across the full lifecycle. An
accumulating body of evidence suggests that exposure to adverse stressors during early life …

We agree with Rothman and colleagues that scientific inference in epidemiology does not
require representativeness of the general population or target population in order to be …

Abstract The Generation R Study is a population-based prospective cohort study from fetal
life until young adulthood. The study is designed to identify early environmental and genetic …

Background Studies examining associations of early-life cat and dog ownership with
childhood asthma have reported inconsistent results. Several factors could explain these …

Background We launched the B oston U niversity P regnancy S tudy O nline (PRESTO) to
assess the feasibility of carrying out an I nternet‐based preconception cohort study in the US …

Research suggests that maternal exposure to natural environments (ie, green and blue
spaces) promotes healthy fetal growth. However, the available evidence is heterogeneous …

Background: Many pregnancy and birth cohort studies investigate the health effects of early-
life environmental contaminant exposure. An overview of existing studies and their data is …