Early-onset neonatal infection and school performance: a Danish nationwide population-based cohort study.

Objectives: We aimed to study the association between early-onset neonatal infection in near-term and term children and school performance based on mandatory tests in reading and mathematics.

Methods: We conducted a nationwide register-based cohort study including all Danish near-term and term singletons born from 1997 to 2009. Early-onset infection was defined as an invasive bacterial infection during the first week of life.

In utero exposure to perfluoroalkyl and polyfluoroalkyl substances and attention and executive function in the offspring: A study in the Danish National Birth Cohort.

Background: Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are ubiquitous in the environment and accumulate in humans. PFAS are suspected to affect the neuropsychological function of children, but only few studies have evaluated the association with childhood attention and executive function.

Objectives: To investigate the association between intrauterine exposure to PFAS and offspring attention and executive function.

Head circumference at birth and childhood developmental disorders in a nationwide cohort in Denmark.

Background: Early markers of Attention Deficit Hyperactivity Disorder (ADHD) and Autism Spectrum Disorder (ASD) may improve the understanding and early recognition of these disorders. We aimed to estimate the association between head circumference at birth, a measure of cerebral size at birth, and the risk of ADHD and ASD.

Methods: We present a register-based cohort study of all Danish singletons born alive between 1997 and 2013.

Congenital Heart Defects and Measures of Prenatal Brain Growth: A Systematic Review.

Background: We summarize the evidence for an association between congenital heart defects and prenatal brain growth through a systematic literature review. Congenital heart defects are among the most common malformations, affecting approximately six per 1000 live births. The association between congenital heart defects and long-term neurodevelopmental disorders is well established.

Perfluoroalkyl Acids in Maternal Serum and Indices of Fetal Growth: The Aarhus Birth Cohort.

Background: Previous studies indicated an association between intrauterine exposure to perfluorooctane sulfonate (PFOS) or perfluorooctanoate (PFOA) and lower birth weight. However, these perfluoroalkyl acids (PFAAs) have to some extent been substituted by other compounds on which little is known.

Objectives: We investigated the association between specific PFAAs and birth weight, birth length, and head circumference at birth.

Serum perfluoroalkyl acids and time to pregnancy in nulliparous women.

Background: Previous studies on the exposure to perfluoroalkyl acids (PFAAs) and female fertility have provided conflicting results. We aimed to investigate the association between several PFAAs and time to pregnancy among nulliparous women.

Methods: From 2008 to 2013, we included 1372 women from the Aarhus Birth Cohort, Aarhus University Hospital, Denmark, who provided data on time to pregnancy and a blood sample before 20 gestational weeks.