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OBJECTIVE To estimate gestational age-specific risks of fetal death in pregnancies complicated by preeclampsia. METHODS Population-based cohort study comprising all singleton births (N=554,333) without preexisting chronic hypertension recorded in the Norwegian Medical Birth Registry from 1999 to 2008. Additional data come from a subset of preeclamptic(More)
BACKGROUND While international variations in overall cesarean delivery rates are well documented, less information is available for clinical sub-groups. Cesarean data presented by subgroups can be used to evaluate uptake of cesarean reduction policies or to monitor delivery practices for high and low risk pregnancies based on new scientific evidence. We(More)
BACKGROUND The Norwegian Mother and Child Cohort Study (MoBa), a prospective population-based pregnancy cohort, is a valuable database for studying causes of pre-eclampsia. Pre-eclampsia data in MoBa come from the Medical Birth Registry of Norway (MBRN); thus, we wanted to study the validity of MBRN pre-eclampsia registration for MoBa women. METHODS We(More)
OBJECTIVE To assess the availability of obstetric institutions, the risk of unplanned delivery outside an institution and maternal morbidity in a national setting in which the number of institutions declined from 95 to 51 during 30 years. DESIGN Retrospective population-based, three cohorts and two cross-sectional analyses. SETTING Census data,(More)
Pre-eclampsia is a leading complication of pregnancy, associated with maternal and neonatal morbidity. The present study describes the epidemiology of pre-eclampsia in Norway, with data from the Medical Birth Registry of Norway, covering 40 years. We aimed at describing time trends in prevalence, selected risk factors and perinatal mortality. We also(More)
BACKGROUND Pregnant women with asthma need to take medication during pregnancy. OBJECTIVE We sought to identify whether there is an increased risk of specific congenital anomalies after exposure to antiasthma medication in the first trimester of pregnancy. METHODS We performed a population-based case-malformed control study testing signals identified in(More)
BACKGROUND Attention-deficit/hyperactivity disorder (ADHD) is a prevalent and disabling lifespan disorder, but little is yet known about risk factors for ADHD persisting beyond adolescence. The present study investigates the association between pregnancy and birth complications and ADHD in adulthood. METHODS We used data from the Medical Birth Registry of(More)
INTRODUCTION The objective of this study was to examine the association between planned mode of delivery and neonatal outcomes in breech deliveries. MATERIAL AND METHODS In this retrospective cohort study we studied singleton term breech deliveries in Norway from 1991 to 2011 (n = 30 861) using the Medical Birth Registry of Norway. We compared planned(More)
OBJECTIVE To assess the association of pre-eclampsia with later cardiovascular death in mothers according to their lifetime number of pregnancies, and particularly after only one child. DESIGN Prospective, population based cohort study. SETTING Medical Birth Registry of Norway. PARTICIPANTS We followed 836,147 Norwegian women with a first singleton(More)
BACKGROUND Hypospadias is a common congenital malformation. The prevalence of hypospadias has a large geographical variation, and recent studies have reported both increasing and decreasing temporal trends. It is unclear whether hypospadias prevalence is associated with maternal age. AIM To analyze the prevalence and trends of total hypospadias, isolated(More)