Olof Stephansson
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View article: Postpartum hemorrhage after <scp>SARS</scp> ‐ <scp>CoV</scp> ‐2 infection in pregnancy: A Scandinavian register‐based cohort study
Postpartum hemorrhage after <span>SARS</span> ‐ <span>CoV</span> ‐2 infection in pregnancy: A Scandinavian register‐based cohort study Open
Introduction The aim was to evaluate whether SARS‐CoV‐2 infection during pregnancy was associated with severe postpartum hemorrhage (PPH), as SARS‐CoV‐2 infection has been shown to affect the coagulation system. Material and Methods In thi…
View article: Machine learning prediction models for mode of delivery in prolonged pregnancies in Sweden
Machine learning prediction models for mode of delivery in prolonged pregnancies in Sweden Open
Induction of labour and not “expectant management” is often recommended to prevent adverse perinatal outcomes in late-term pregnancies, but no prognostic prediction model exists for an individualized decision-making. The present study used…
View article: Maternal and Interpregnancy Factors and Risks of First‐Time Preeclampsia in Second Pregnancy: A Swedish National Cohort Study
Maternal and Interpregnancy Factors and Risks of First‐Time Preeclampsia in Second Pregnancy: A Swedish National Cohort Study Open
Objective To investigate factors associated with first‐time preeclampsia in second pregnancies. Design Population‐based cohort study using Swedish national registers. Setting Sweden 1992–2019. Population A group of 808 107 women with secon…
View article: Glycaemic Control in Women With Type 1 Diabetes and Preeclampsia Risk: A Nationwide Cohort Study
Glycaemic Control in Women With Type 1 Diabetes and Preeclampsia Risk: A Nationwide Cohort Study Open
Objective No large‐scale studies exist investigating glycaemic control around conception and preeclampsia risk. Design Population‐based nationwide cohort study using the National Diabetes Register and other health registers. Setting Sweden…
View article: Pregnancy Outcomes in Women With Systemic Sclerosis Before and/or After Diagnosis and by Parity: A Swedish Population‐Based Cohort Study
Pregnancy Outcomes in Women With Systemic Sclerosis Before and/or After Diagnosis and by Parity: A Swedish Population‐Based Cohort Study Open
Objective To assess risks of adverse pregnancy outcomes (APOs) in a contemporary cohort of women with systemic sclerosis (SSc) in relation to the timing of SSc diagnosis and by parity. Methods From the nationwide Swedish Medical Birth Regi…
View article: COVID-19 infection increases the risk of venous thromboembolism during pregnancy and the postpartum period
COVID-19 infection increases the risk of venous thromboembolism during pregnancy and the postpartum period Open
View article: Mortality and Cancer in Offspring of Mothers With Biopsy‐Proven <scp>MASLD</scp> During Pregnancy: A Nationwide Cohort Study
Mortality and Cancer in Offspring of Mothers With Biopsy‐Proven <span>MASLD</span> During Pregnancy: A Nationwide Cohort Study Open
Background & Aims Health‐related outcomes through early adulthood among offspring prenatally exposed to maternal metabolic dysfunction‐associated steatotic liver disease (MASLD) are insufficiently investigated. We aimed to study the risk o…
View article: Risk factors for small-for-gestational age births among nulliparous and parous women after gastric bypass: A population-based cohort study
Risk factors for small-for-gestational age births among nulliparous and parous women after gastric bypass: A population-based cohort study Open
View article: Adverse pregnancy and birth outcomes in women with biopsy-proven MASLD: a nationwide cohort study
Adverse pregnancy and birth outcomes in women with biopsy-proven MASLD: a nationwide cohort study Open
View article: The relationship between crowding in the delivery ward and the risk of postpartum hemorrhage
The relationship between crowding in the delivery ward and the risk of postpartum hemorrhage Open
Introduction Postpartum hemorrhage (PPH) is a key concern in maternal health, with early identification important for preventing severe complications. In a crowded delivery ward, where the number of births exceeds the normal range, labor m…
View article: Digital healthcare as a solution for global challenges: A call for action
Digital healthcare as a solution for global challenges: A call for action Open
View article: Optimal Pregnancy Weight Gain Ranges in Pregnancies with Underweight, Normal Weight and Overweight: A Population-Based Swedish Cohort Study
Optimal Pregnancy Weight Gain Ranges in Pregnancies with Underweight, Normal Weight and Overweight: A Population-Based Swedish Cohort Study Open
View article: Postnatal betamethasone treatment in extremely preterm infants and risk of neurodevelopmental impairment: a cohort study
Postnatal betamethasone treatment in extremely preterm infants and risk of neurodevelopmental impairment: a cohort study Open
Objective To evaluate if postnatal treatment with betamethasone in extremely preterm infants was associated with neurodevelopmental impairment (NDI) at 6.5 years of age. Design Prospective cohort study. Setting Extremely Preterm Infants in…
View article: Adverse pregnancy outcomes, familial predisposition, and cardiovascular risk: a Swedish nationwide study
Adverse pregnancy outcomes, familial predisposition, and cardiovascular risk: a Swedish nationwide study Open
Background and Aims Adverse pregnancy outcomes (APOs) are recognized as significant female-specific risk factors for cardiovascular disease (CVD). A potential shared familial susceptibility between APOs and CVD has been proposed, but not t…
View article: Hospital obstetric volume and maternal outcomes: Does hospital size matter?
Hospital obstetric volume and maternal outcomes: Does hospital size matter? Open
Introduction In recent decades, centralization of health care has resulted in a number of obstetric unit closures. While studies support better infant outcomes in larger facilities, few have investigated maternal outcomes. We investigated …
View article: Maternal pre-gestational and gestational diabetes and risk of offspring epilepsy: A cohort study
Maternal pre-gestational and gestational diabetes and risk of offspring epilepsy: A cohort study Open
Background Despite growing evidence linking maternal diabetes to impaired brain physiology and neurodevelopment in offspring, evidence on its effect on epilepsy remains scarce. This study aims to determine if intrauterine exposure to mater…
View article: Midwifery Continuity of Care During Pregnancy, Birth, and the Postpartum Period: A Matched Cohort Study
Midwifery Continuity of Care During Pregnancy, Birth, and the Postpartum Period: A Matched Cohort Study Open
Objective To compare pregnancy outcomes in a midwifery continuity of care (MCoC) model to standard midwifery care in Sweden. Design Matched cohort study. Setting Public healthcare during pregnancy and childbirth, Stockholm, Sweden. Populat…
View article: Risk of postpartum hemorrhage with increasing first stage labor duration
Risk of postpartum hemorrhage with increasing first stage labor duration Open
With increasing rates of postpartum hemorrhage (PPH) in high-income countries, an important clinical concern is the impact of labor duration on the risk of PPH. This study examined the relationship between increasing active first stage lab…
View article: Birth Weight, Gestational Age, and Risk of Pediatric-Onset MASLD
Birth Weight, Gestational Age, and Risk of Pediatric-Onset MASLD Open
Importance Metabolic dysfunction–associated steatotic liver disease (MASLD) has become the most common chronic liver disease worldwide and is increasingly being diagnosed at younger ages, affecting more than one-third of young people with …
View article: Association between ambient air pollution a week prior to delivery and preterm birth using a nationwide study in Sweden
Association between ambient air pollution a week prior to delivery and preterm birth using a nationwide study in Sweden Open
Increased O3 exposure one week before delivery was associated with an increased risk of preterm birth in Sweden, a country with levels of air pollution below the current World Health Organization air quality guidelines. Increase…
View article: Can short‐ and long‐term maternal and infant risks linked to hypertension and diabetes during pregnancy be reduced by therapy?
Can short‐ and long‐term maternal and infant risks linked to hypertension and diabetes during pregnancy be reduced by therapy? Open
Hypertensive disorders of pregnancy (HDP), especially preeclampsia, and diabetes during pregnancy pose significant risks for both maternal and infant health, extending to long‐term outcomes such as early‐onset cardiovascular disease and me…
View article: Covid-19 infection and vaccination during first trimester and risk of congenital anomalies: Nordic registry based study
Covid-19 infection and vaccination during first trimester and risk of congenital anomalies: Nordic registry based study Open
Objectives To evaluate the risk of major congenital anomalies according to infection with or vaccination against covid-19 during the first trimester of pregnancy. Design Prospective Nordic registry based study. Setting Sweden, Denmark, and…
View article: Acetaminophen Use During Pregnancy and Children’s Risk of Autism, ADHD, and Intellectual Disability
Acetaminophen Use During Pregnancy and Children’s Risk of Autism, ADHD, and Intellectual Disability Open
Importance Several studies suggest that acetaminophen (paracetamol) use during pregnancy may increase risk of neurodevelopmental disorders in children. If true, this would have substantial implications for management of pain and fever duri…
View article: Safety of low weight gain or weight loss in pregnancies with class 1, 2, and 3 obesity: a population-based cohort study
Safety of low weight gain or weight loss in pregnancies with class 1, 2, and 3 obesity: a population-based cohort study Open
View article: Histologic Remission in Inflammatory Bowel Disease and Female Fertility: A Nationwide Study
Histologic Remission in Inflammatory Bowel Disease and Female Fertility: A Nationwide Study Open
An association between histologic and clinical activity and reduced female fertility in CD and UC was found. Notably, histologic inflammation was also linked to reduced fertility in women with clinically quiescent IBD.
View article: Neonatal Outcomes After COVID-19 Vaccination in Pregnancy
Neonatal Outcomes After COVID-19 Vaccination in Pregnancy Open
Importance Better knowledge about neonatal adverse events after COVID-19 vaccination during pregnancy could help address concerns about vaccine safety. Objective To evaluate the risks of neonatal adverse events after exposure to COVID-19 v…
View article: Three Scandinavian countries did not see the same increase in foetal situs inversus observed in China during the <scp>COVID</scp>‐19 pandemic
Three Scandinavian countries did not see the same increase in foetal situs inversus observed in China during the <span>COVID</span>‐19 pandemic Open
In late 2023, the New England Journal of Medicine published a paper by Wang et al. that noted a substantial increase in foetal situs inversus cases in two Chinese regions earlier that year.1 Foetal situs inversus is a rare congenital condi…
View article: Neurological development in children born moderately or late preterm: national cohort study
Neurological development in children born moderately or late preterm: national cohort study Open
Objective To assess long term neurodevelopmental outcomes of children born at different gestational ages, particularly 32-33 weeks (moderately preterm) and 34-36 weeks (late preterm), compared with 39-40 weeks (full term). Design Nationwid…
View article: Maternal intrahepatic cholestasis of pregnancy and neurodevelopmental conditions in offspring: A population-based cohort study of 2 million Swedish children
Maternal intrahepatic cholestasis of pregnancy and neurodevelopmental conditions in offspring: A population-based cohort study of 2 million Swedish children Open
Background Intrahepatic cholestasis of pregnancy (ICP) is the most common obstetric liver disorder and is associated with an increased risk of iatrogenic preterm birth and adverse infant outcomes. Hence, there are several plausible pathway…
View article: Maternal and pregnancy predictive risk factors for having a compensated maternal injury claim: a Swedish nationwide cohort study
Maternal and pregnancy predictive risk factors for having a compensated maternal injury claim: a Swedish nationwide cohort study Open