2024

• Nilsen, Roy Miodini; Strandberg, Ragnhild Bjarkøy; Yaya, Yaliso et al. (2024). Pre-pregnancy obesity among immigrant and non-immigrant women in Norway: Prevalence, trends, and subgroup variations. (external link)
• Mæland, Karolina S.; Morken, Nils-Halvdan; Schytt, Erica et al. (2024). Associations between non-registered ultrasound examination in pregnancy and adverse perinatal outcomes in immigrant and non-immigrant women: a Norwegian population-based study 1999–2016. (external link)
• Arshad, Nadia; Skjaerven, Rolv; Klungsøyr, Kari et al. (2024). Pregnancy-Associated Maternal Mortality Within One Year After Childbirth: Population-Based Cohort Study. (external link)
• Warp, Mari Landås; Grindstad, Thea Karoline Walstad; Magnus, Maria Christine et al. (2024). Early or late menarche is associated with reduced fecundability in the Norwegian Mother, Father and Child Cohort Study. (external link)
• Nordklev, Cecilie Bryn; Gjesdal, Ola; Gunnes, Nina et al. (2024). Down syndrome and associated atrioventricular septal defects in a nationwide Norwegian cohort: Prevalence, time trends, and outcomes. (external link)
• Einum, Anders; Harmon, Quaker E.; Sørbye, Linn Marie et al. (2024). Associations between term cesarean delivery in the first pregnancy and second-pregnancy preterm delivery. (external link)

2023

• Mæland, Karolina Sofia; Nilsen, Roy Miodini; Morken, Nils-Halvdan et al. (2023). Migration-related risk factors and perinatal outcomes: A national population-based study of immigrant and non-immigrant women in Norway. (external link)
• Rasmussen, Svein; Carlsen, Ellen Øen; Linde, Lorentz et al. (2023). Paternal and maternal birthweight and offspring risk of macrosomia at term gestations: A nationwide population study. (external link)
• Einum, Anders; Sørbye, Linn Marie; Nilsen, Roy Miodini et al. (2023). Unveiling sex bias and adverse neonatal outcomes in ultrasound estimation of gestational age: A population-based cohort study. (external link)
• Mæland, Karolina Sofia; Morken, Nils-Halvdan; Schytt, Erica et al. (2023). Risk of Subsequent Preeclampsia by Maternal Country of Birth: A Norwegian Population-Based Study. (external link)
• Basnet, Prativa; Skjaerven, Rolv; Harmon, Quaker E. et al. (2023). Risk of adverse pregnancy outcomes in twin- and singleton-born women: An inter-generational cohort study. (external link)
• Sima, Yeneabeba Tilahun; Magnus, Maria Christine; Kvalvik, Liv Grimstvedt et al. (2023). The relationship between cesarean delivery and fecundability: a population-based cohort study. (external link)
• Basnet, Prativa; Skjaerven, Rolv; Harmon, Quaker E. et al. (2023). Birthweight of the subsequent singleton pregnancy following a first twin or singleton pregnancy. (external link)
• Seid, Abdu Kedir; Morken, Nils-Halvdan; Klungsøyr, Kari et al. (2023). Pregnancy complications in last pregnancy and mothers’ long-term cardiovascular mortality: does the relation differ from that of complications in first pregnancy? A population-based study. (external link)
• Sima, Yeneabeba Tilahun; Skjaerven, Rolv; Kvalvik, Liv Grimstvedt et al. (2023). Birth Weight in Consecutive Pregnancies and Maternal Cardiovascular Disease Mortality Among Spontaneous and Iatrogenic Term Births: A Population-Based Cohort Study. (external link)
• Morken, Nils-Halvdan (2023). Wrapping up eight years of editing in a healthy medical journal. (external link)
• Sande, Anne Kvie; Dalen, Ingvild; Torkildsen, Erik Andreas et al. (2023). Pregestational maternal risk factors for preterm and term preeclampsia: A population-based cohort study. (external link)

2022

• Sagstad, Mari Haaland; Morken, Nils-Halvdan; Lund, Agnethe et al. (2022). Quantitative User Data From a Chatbot Developed for Women With Gestational Diabetes Mellitus: Observational Study. (external link)
• Engen, Tone; Owe, Katrine Mari; Horn, Julie et al. (2022). Preconception leisure-time physical activity and family history of stroke and myocardial infarction associate with preterm delivery: findings from a Norwegian cohort. (external link)
• Haavaldsen, Camilla; Morken, Nils-Halvdan; Saugstad, Ola Didrik et al. (2022). Is the increasing prevalence of labor induction accompanied by changes in pregnancy outcomes? An observational study of all singleton births at gestational weeks 37–42 in Norway during 1999–2019. (external link)
• Sande, Anne Kvie; Torkildsen, Erik Andreas; Sande, Ragnar et al. (2022). Use of antihistamines before or during pregnancy and risk of early-onset pre-eclampsia in allergic women: a population-based cohort study. (external link)
• Mæland, Karolina Sofia; Morken, Nils-Halvdan; Schytt, Erica et al. (2022). Rsik of Recurrent Preeclampsia by Maternal Region of Birth: A Nationwide Population-based Study . (external link)
• Sima, Yeneabeba; Skjaerven, Rolv; Kvalvik, Liv Grimstvedt et al. (2022). Cesarean delivery in Norwegian nulliparous women with singleton cephalic term births, 1967–2020: a population-based study. (external link)
• Basnet, Prativa; Skjaerven, Rolv; Sørbye, Linn Marie et al. (2022). Long-term cardiovascular mortality in women with twin pregnancies by lifetime reproductive history. (external link)

2021

• Mæland, Karolina Sofia; Morken, Nils-Halvdan; Aasheim, Vigdis et al. (2021). Complications during pregnancy and childbirth in immigrant women giving birth in Norway. (external link)
• Mæland, Karolina Sofia; Morken, Nils-Halvdan; Schytt, Erica et al. (2021). Pregnancy Outcomes in Immigrant Women in Norway. (external link)
• Haavaldsen, Camilla; Morken, Nils-Halvdan; Eskild, Anne (2021). Antall induksjoner øker – har det noen betydning for utfallet? . (external link)
• Haavaldsen, Camilla; Morken, Nils-Halvdan; Eskild, Anne (2021). Increasing prevalence of labour induction; has it had any impact on the prevalence of adverse pregnancy outcomes? A populations study in Norway 1999-2019.. (external link)
• Mæland, Karolina Sofia; Morken, Nils-Halvdan; Schytt, Erica et al. (2021). Placental Abruption by Maternal Country of Birth: a nationwide population-based study. (external link)
• Mæland, Karolina S.; Morken, Nils-Halvdan; Schytt, Erica et al. (2021). Obstetric outcomes in immigrant women in Norway. (external link)
• Magnus, Maria Christine; Havdahl, Alexandra; Morken, Nils-Halvdan et al. (2021). Risk of miscarriage in women with psychiatric disorders. (external link)
• Magnus, Maria Christine; Morken, Nils-Halvdan; Wensaas, Knut-Arne et al. (2021). Risk of miscarriage in women with chronic diseases in Norway: A registry linkage study. (external link)

2020

• Malmström, Ola; Håberg, Siri Eldevik; Morken, Nils-Halvdan (2020). Probability and outcomes of second pregnancy after HELLP syndrome in the first: A population-based registry study. (external link)
• Eide, Kristiane Tislevoll; Morken, Nils-Halvdan; Bærøe, Kristine (2020). Tensions and interplay: A qualitative study of access to patient-centered birth counseling of maternal cesarean requests in Norway. . (external link)
• Mæland, Karolina Sofia; Morken, Nils-Halvdan; Schytt, Erica et al. (2020). Placental abruption in immigrant women in Norway: a population-based study. (external link)
• Sørbye, Linn Marie; Cnattingius, Sven; Skjærven, Rolv et al. (2020). Interpregnancy weight change and recurrence of gestational diabetes mellitus: a population-based cohort study. (external link)

2019

• Pirnat, Aleksandra; deRoo, Lisa; Skjaerven, Rolv et al. (2019). Risk of having one lifetime pregnancy and modification by outcome of pregnancy and perinatal loss. (external link)
• Magnus, Maria Christine; Wilcox, Allen James; Morken, Nils-Halvdan et al. (2019). Role of maternal age and pregnancy history in risk of miscarriage: prospective register based study. (external link)
• Pirnat, Aleksandra; deRoo, Lisa; Skjaerven, Rolv et al. (2019). Lipid levels after childbirth and association with number of children: A population-based cohort study. (external link)
• Sørbye, Linn Marie; Morken, Nils-Halvdan; Klungsøyr, Kari (2019). Maternal weight, weight change and perinatal outcomes: Can physical activity and gestational weight gain modify the risk?. (external link)
• Eide, Kristiane Tislevoll; Morken, Nils-Halvdan; Bærøe, Kristine (2019). Maternal reasons for requesting planned cesarean section in Norway: A qualitative study. (external link)
• Danielsson, Kim Christian; Gilhus, Nils Erik; Borthen, Ingrid et al. (2019). Maternal complications in pregnancy and childbirth for women with epilepsy: time trends in a nationwide cohort. (external link)
• Morken, Nils-Halvdan (2019). Victims and addicts of biostatistics. (external link)

2018

• Smith, Lucy K; Morisaki, Naho; Morken, Nils-Halvdan et al. (2018). An international comparison of death classification at 22 to 25 weeks' gestational age. (external link)
• Kesmodel, Ulrik Schiøler; Morken, Nils-Halvdan (2018). Methodological challenges in studies in obstetrics and gynecology. (external link)
• Danielsson, Kim Christian; Borthen, Ingrid; Gilhus, Nils Erik et al. (2018). The effect of parity on risk of complications in pregnant women with epilepsy: a population-based cohort study. (external link)
• Velle-Forbord, Veronica; Skråstad, Ragnhild Bergene; Salvesen, Øyvind et al. (2018). Breastfeeding and long‐term maternal metabolic health in the HUNT Study: a longitudinal population‐based cohort study. (external link)
• Velle-Forbord, Veronica; Skråstad, Ragnhild Bergene; Salvesen, Øyvind et al. (2018). Breastfeeding and long-term metabolic health: consequence or reverse causality?. (external link)
• Engjom, Hilde Marie; Morken, Nils-Halvdan; Klungsøyr, Kari (2018). Risiko for peripartum perinatal død ved fødsler i fødestue. (external link)
• Pirnat, Aleksandra; deRoo, Lisa; Skjaerven, Rolv et al. (2018). Women's prepregnancy lipid levels and number of children: a Norwegian prospective population-based cohort study. (external link)
• Engjom, Hilde Marie; Morken, Nils-Halvdan; Høydahl, Even et al. (2018). Risk of eclampsia or HELLP-syndrome by institution availability and place of delivery - A population-based cohort study. (external link)
• Engjom, Hilde Marie; Norheim, Ole Frithjof; Lindtjorn, Bernt et al. (2018). Obstetric care in Norway - the role of institution availability and place of delivery for maternal and perinatal outcomes. Population-based retrospective cohort studies. (external link)
• Danielsson, Kim Christian; Borthen, Ingrid; Morken, Nils-Halvdan et al. (2018). Hypertensive pregnancy complications in women with epilepsy and antiepileptic drugs; a population-based cohort study of first pregnancies in Norway. (external link)
• Malmström, Ola; Morken, Nils-Halvdan (2018). HELLP syndrome, risk factors in first and second pregnancy: a population-based cohort study. (external link)
• Khatibi, Ali; Nybo Andersen, Anne-Marie; Gissler, Mika et al. (2018). Obstetric and neonatal outcome in women aged 50 years and up: A collaborative, Nordic population-based study. (external link)
• Sande, Anne Kvie; Torkildsen, Erik Andreas; Sande, Ragnar et al. (2018). Maternal allergy as an isolated risk factor for early-onset preeclampsia: An epidemiological study. (external link)
• Morken, Nils-Halvdan; Halland, Frode; deRoo, Lisa et al. (2018). Offspring birthweight by gestational age and parental cardiovascular mortality: a population-based cohort study. (external link)

2017

• Sørbye, Linn Marie; Skjaerven, Rolv; Klungsøyr, Kari et al. (2017). Gestational diabetes mellitus and interpregnancy weight change: A population-based cohort study. (external link)
• Engjom, Hilde Marie; Morken, Nils-Halvdan; Høydahl, Even et al. (2017). Increased risk of peripartum perinatal mortality in unplanned births outside an institution: a retrospective population-based study. (external link)
• Engjom, Hilde Marie; Morken, Nils-Halvdan; Klungsøyr, Kari (2017). Reply. (external link)
• Magnus, Maria Christine; Ghaderi, Sara; Morken, Nils-Halvdan et al. (2017). Vanishing twin syndrome among ART singletons and pregnancy outcomes. (external link)

2016

• Richards, Jennifer L.; Kramer, Michael S.; Deb-Rinker, Paromita et al. (2016). Temporal trends in late preterm and early term birthrates in 6 high-income countries in North America and Europe and association with clinician-initiated obstetric interventions. (external link)
• Morken, Nils-Halvdan; Skjaerven, Rolv; Richards, Jennifer L. et al. (2016). Adverse infant outcomes associated with discordant gestational age estimates. (external link)
• Morken, Nils-Halvdan; Jacobsson, Bo (2016). Vaginal progesteronbehandling i graviditet forebygger ikke for tidlig fødsel. (external link)
• Halland, Frode; Morken, Nils-Halvdan; deRoo, Lisa et al. (2016). Long-term mortality in mothers with perinatal losses and risk modification by surviving children and attained education: A population-based cohort study. (external link)
• Kvalvik, Liv Grimstvedt; Haug, Kjell; Klungsøyr, Kari et al. (2016). Maternal smoking status in successive pregnancies and risk of having a small for gestational age infant. (external link)

2015

• deRoo, Lisa; Skjaerven, Rolv; Wilcox, Allen et al. (2015). Placental abruption and long-term maternal cardiovascular disease mortality: a population-based registry study in Norway and Sweden. (external link)
• Sørbye, Linn Marie; Klungsøyr, Kari; Samdal, Oddrun et al. (2015). Pre-pregnant body mass index and recreational physical activity: effects on perinatal mortality in a prospective pregnancy cohort. (external link)
• Verner, Marc-André; Loccisano, Anne E.; Morken, Nils-Halvdan et al. (2015). Assfociations of perfluoroalkyl substances (PFAS) with lower birth weight: An evaluation of potential confounding by glomerular filtration rate using a physiologically based pharmacokinetic model (PBPK). (external link)
• Halland, Frode; Morken, Nils-Halvdan; deRoo, Lisa et al. (2015). Association of Women's Reproductive History with Long-term Mortality and Effect of Socioeconomic Factors. (external link)
• Morken, Nils-Halvdan; Diaz-Garcia, César; Reisæter, Anna Varberg et al. (2015). Obstetric and neonatal outcome of pregnancies fathered by males on immunosuppression after solid organ transplantation. (external link)
• Morken, Nils-Halvdan; Skjaerven, Rolv; Wilcox, Allen J. (2015). Ultrasound prediction of perinatal outcome: the unrecognised value of sibling data. (external link)

2014

• Morken, Nils-Halvdan; Klungsøyr, Kari ; Skjaerven, Rolv (2014). Perinatal mortality by gestational week and size at birth in singleton pregnancies at and beyond term: A nationwide population-based cohort study. (external link)
• Morken, Nils-Halvdan; Travlos, Gregory S.; Wilson, Ralph E. et al. (2014). Maternal glomerular filtration rate in pregnancy and fetal size. (external link)
• Engjom, Hilde Marie; Morken, Nils-Halvdan; Norheim, Ole Frithjof et al. (2014). Availability and access in modern obstetric care: a retrospective population-based study. (external link)
• Morken, Nils-Halvdan; Källén, Karin; Jacobsson, Bo (2014). Predicting risk of spontaneous preterm delivery in women with a singleton pregnancy. (external link)

2013

• Engjom, Hilde Marie; Morken, Nils-Halvdan; Norheim, Ole Frithjof et al. (2013). Availability and access in modern obstetric care: a retrospective population-based cohort study. (external link)
• Morken, Nils-Halvdan; Melve, Kari Klungsøyr; Magnus, Per et al. (2013). Pre-pregnant body mass index, gestational weight gain and the risk of operative delivery. (external link)
• Myking, Solveig; Boyd, Heather A; Myhre, Ronny et al. (2013). X-chromosomal maternal and fetal SNPs and the risk of spontaneous preterm delivery in a Danish/Norwegian genome-wide association study. (external link)
• Morken, Nils-Halvdan; Diaz-Garcia, Cesar; Brännström, Mats (2013). Maternal solid organ transplantation and pregnancy outcome; a national population-based cohort study. (external link)
• Pennell, Craig E.; Vadillo-Ortega, Felipe; Olson, David M. et al. (2013). Preterm Birth Genome Project (PGP) - Validation of resources for preterm birth genome-wide studies. (external link)

2012

• Khatibi, Ali; Brantsæter, Anne Lise; Sengpiel, Verena et al. (2012). Prepregnancy maternal body mass index and preterm delivery. (external link)
• Khatibi, Ali; Sengpiel, Verena; Kacerovsky, Marian et al. (2012). Pre-pregnancy maternal body mass index, physical activity, nutrition, and preterm delivery. (external link)
• Morken, Nils-Halfdan; Magnus, Per; Skjaerven, Rolv (2012). Pre-pregnant body mass index, gestational weight gain and the risk of operative delivery. (external link)
• Alleman, Brandon W; Myking, Solveig; Ryckman, Kelli K et al. (2012). No observed association for mitochondrial SNPs with preterm delivery and related outcomes. (external link)
• Morken, Nils-Halvdan (2012). Preterm birth: new data on a global health priority. (external link)
• Morken, Nils-Halvdan; Melve, Kari Klungsøyr; Skjaerven, Rolv (2012). Recurrence of Prolonged and Postterm Gestational Age Across Generations: Maternal and Paternal Contribution EDITORIAL COMMENT. (external link)
• Melve, Kari Klungsøyr; Morken, Nils-Halvdan; Irgens, Lorentz M. et al. (2012). Secular trends in the epidemiology of pre-eclampsia throughout 40 years in Norway: prevalence, risk factors and perinatal survival. (external link)
• Morken, Nils-Halvdan (2012). What is the price of proactive management in post term pregnancies?. (external link)

2011

• Morken, Nils-halvdan (2011). Preterm delivery in IVF versus ICSI singleton pregnancies: a national population-based cohort. (external link)
• Myking, Solveig; Myhre, Ronny; Gjessing, Håkon et al. (2011). Candidate gene analysis of spontaneous preterm delivery: New insights from re-analysis of a case-control study using case-parent triads and control-mother dyads. (external link)
• Morken, Nils-Halvdan; Melve, Kari Klungsøyr; Skjaerven, Rolv (2011). Recurrence of prolonged and post-term gestational age across generations: maternal and paternal contribution. (external link)
• Morken, Nils-Halvdan; Gunnes, Nina; Magnus, Per et al. (2011). Risk of spontaneous preterm delivery in a low-risk population: the impact of maternal febrile episodes, urinary tract infection, pneumonia and ear-nose-throat infections. (external link)

2010

• Ryckman, Kelli K; Morken, Nils-Halvdan; White, Marquitta J et al. (2010). Maternal and fetal genetic associations of PTGER3 and PON1 with preterm birth. (external link)
• Morken, Nils-halvdan (2010). Time to focus on the public health aspects of preterm delivery. (external link)
• Morken, Nils-halvdan; Albrechtsen, Susanne; Backe, Bjørn (2010). Caesarean section does not prevent cerebral palsy in singleton term breech infants. (external link)

2009

• Jacobsson, Bo; Aaltonen, Riikka; Rantakokko-Jalava, Kaisu et al. (2009). Quantification of Ureaplasma urealyticum DNA in the amniotic fluid from patients in PTL and pPROM and its relation to inflammatory cytokine levels. (external link)

2008

• Morken, Nils-Halvdan; Vogel, Ida; Kallen, Karin et al. (2008). Reference population for international comparisons and time trend surveillance of preterm delivery proportions in three countries. (external link)
• Morken, Nils-Halvdan; Magnus, Per; Jacobsson, Bo (2008). Subgroups of preterm delivery in the Norwegian Mother and Child Cohort Study. (external link)

2006

• Svenningsen, Rune; Morken, Nils-Halvdan; Kahn, Jarl (2006). Kortikosteroider i behandlingen av HELLP-syndrom?. (external link)
• Morken, Nils-Halvdan; Kahn, Jarl (2006). Placenta accreta and methotrexate treatment. (external link)

See a complete overview of publications in Cristin.