Obstetrikk og Gynekologi i MED 9

Masterstudiet i ernæring

2026

• Cecilie Bryn Nordklev; Denise Reis Costa; Roy Miodini Nilsen et al. (2026). Impact of National Screening Programs on Down syndrome prevalence and outcomes. (ekstern lenke)

2023

• Benedikte Gjerde Vågenes; Siren Tveitnes; Nils-Halvdan Morken et al. (2023). Forekomst av spontan preterm fødsel i Norge mellom 1967-2020 – En deskriptiv populasjonbasert studie. (ekstern lenke)
• Linn Marie Sørbye; Nils-Halvdan Morken; Ruth Marie Haug et al. (2023). Forekomst av indusert preterm fødsel – en populasjonsbasert registerstudie. (ekstern lenke)
• Karolina Sofia Mæland; Roy Miodini Nilsen; Nils-Halvdan Morken et al. (2023). Migration-related risk factors and perinatal outcomes: A national population-based study of immigrant and non-immigrant women in Norway. (ekstern lenke)
• Yeneabeba Tilahun Sima; Maria Christine Magnus; Liv Grimstvedt Kvalvik et al. (2023). The relationship between cesarean delivery and fecundability: a population-based cohort study. (ekstern lenke)
• Prativa Basnet; Rolv Skjaerven; Quaker E. Harmon et al. (2023). Birthweight of the subsequent singleton pregnancy following a first twin or singleton pregnancy. (ekstern lenke)
• Svein Rasmussen; Ellen Øen Carlsen; Lorentz Linde et al. (2023). Paternal and maternal birthweight and offspring risk of macrosomia at term gestations: A nationwide population study. (ekstern lenke)
• Yeneabeba Tilahun Sima; Rolv Skjaerven; Liv Grimstvedt Kvalvik et al. (2023). Birth Weight in Consecutive Pregnancies and Maternal Cardiovascular Disease Mortality Among Spontaneous and Iatrogenic Term Births: A Population-Based Cohort Study. (ekstern lenke)
• Karolina Sofia Mæland; Nils-Halvdan Morken; Erica Schytt et al. (2023). Risk of Subsequent Preeclampsia by Maternal Country of Birth: A Norwegian Population-Based Study. (ekstern lenke)
• Nils-Halvdan Morken (2023). Wrapping up eight years of editing in a healthy medical journal. (ekstern lenke)
• Anne Kvie Sande; Ingvild Dalen; Erik Andreas Torkildsen et al. (2023). Pregestational maternal risk factors for preterm and term preeclampsia: A population-based cohort study. (ekstern lenke)
• Prativa Basnet; Rolv Skjaerven; Quaker E. Harmon et al. (2023). Risk of adverse pregnancy outcomes in twin- and singleton-born women: An inter-generational cohort study. (ekstern lenke)
• Abdu Kedir Seid; Nils-Halvdan Morken; Kari Klungsøyr 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. (ekstern lenke)
• Anders Einum; Linn Marie Sørbye; Roy Miodini Nilsen et al. (2023). Unveiling sex bias and adverse neonatal outcomes in ultrasound estimation of gestational age: A population-based cohort study. (ekstern lenke)

2024

• Ingvild Vollesfjord Moseid; Sølvi Tørressen; Nils-Halvdan Morken et al. (2024). Sammenheng mellom pregravid kroppsmasseindeks og preterm fødsel: En registerstudie. (ekstern lenke)
• Mari Landås Warp; Thea Karoline Walstad Grindstad; Maria Christine Magnus et al. (2024). Early or late menarche is associated with reduced fecundability in the Norwegian Mother, Father and Child Cohort Study. (ekstern lenke)
• Nadia Arshad; Rolv Skjaerven; Kari Klungsøyr et al. (2024). Pregnancy-Associated Maternal Mortality Within One Year After Childbirth: Population-Based Cohort Study. (ekstern lenke)
• Cecilie Bryn Nordklev; Ola Gjesdal; Nina Gunnes et al. (2024). Down syndrome and associated atrioventricular septal defects in a nationwide Norwegian cohort: Prevalence, time trends, and outcomes. (ekstern lenke)
• Karolina S. Mæland; Nils-Halvdan Morken; Erica Schytt 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. (ekstern lenke)
• Maria Christine Magnus; Yunsung Lee; Ellen Øen Carlsen et al. (2024). Parental epigenetic age acceleration and risk of adverse birth outcomes: the Norwegian mother, father and child cohort study. (ekstern lenke)
• Roy Miodini Nilsen; Ragnhild Bjarkøy Strandberg; Yaliso Yaya et al. (2024). Pre-pregnancy obesity among immigrant and non-immigrant women in Norway: Prevalence, trends, and subgroup variations. (ekstern lenke)
• Anders Einum; Quaker E. Harmon; Linn Marie Sørbye et al. (2024). Associations between term cesarean delivery in the first pregnancy and second-pregnancy preterm delivery. (ekstern lenke)

2025

• Linn Marie Sørbye; Kari Klungsøyr; Nils-Halvdan Morken et al. (2025). Pre-pregnancy body mass index and risk of gestational diabetes mellitus by maternal country of birth: a registry-based study.. (ekstern lenke)
• Linn Marie Sørbye; Kari Klungsøyr; Nils-Halvdan Morken et al. (2025). Pre-pregnancy body mass index and risk of gestational diabetes mellitus by country of birth: A registry-based study.. (ekstern lenke)
• Merete Salveson Engeset; Linn Marie Sørbye; Nils-Halvdan Morken et al. (2025). Physical and cognitive performance by gestational age in young men and women: A national population-based study. (ekstern lenke)
• Elise Amanda Aspenes Janson; Berit Gjendem Solemdal; Nils-Halvdan Morken et al. (2025). Periodontal status hos gravide kvinner. (ekstern lenke)
• Mari Landås Warp; Karoline Hansen Skåra; Thea Karoline Walstad Grindstad et al. (2025). The functional ovarian anatomy of 492 women aged 18–22 years: a population-based study in Norway. (ekstern lenke)
• Maria Christine Magnus; Yunsung Lee; Ellen Øen Carlsen et al. (2025). Correction: Parental epigenetic age acceleration and risk of adverse birth outcomes: the Norwegian mother, father and child cohort study. (ekstern lenke)
• Chloe Sage Wyatt; Rolv Skjaerven; Lars Johan Vatten et al. (2025). Hypertensive Disorders of Pregnancy, Preterm Delivery, and Infant Size: Which Mothers Have Highest Cardiovascular Disease Mortality?. (ekstern lenke)
• Anders Einum; Roy Miodini Nilsen; Quaker E. Harmon et al. (2025). Timing of progesterone treatment to prevent preterm birth in pregnancies with a short cervix: A population-based historical cohort study. (ekstern lenke)
• Torill Alise Rotevatn; Nina Høy-Petersen; Lema Hussaini et al. (2025). Utilization of antenatal care among immigrant women in Norway: a nationwide register-based cohort study. (ekstern lenke)
• Mari Landås Warp; Thea Karoline Walstad Grindstad; Karoline Hansen Skåra et al. (2025). Maternal time interval between menarche and childbirth is associated with daughter's age at menarche. (ekstern lenke)

2020

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

2018

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

2015

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

2016

• Frode Halland; Nils-Halvdan Morken; Lisa deRoo 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. (ekstern lenke)
• Jennifer L. Richards; Michael S. Kramer; Paromita Deb-Rinker 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. (ekstern lenke)
• Liv Grimstvedt Kvalvik; Kjell Haug; Kari Klungsøyr et al. (2016). Maternal smoking status in successive pregnancies and risk of having a small for gestational age infant. (ekstern lenke)
• Nils-Halvdan Morken; Bo Jacobsson (2016). Vaginal progesteronbehandling i graviditet forebygger ikke for tidlig fødsel. (ekstern lenke)
• Nils-Halvdan Morken; Rolv Skjaerven; Jennifer L. Richards et al. (2016). Adverse infant outcomes associated with discordant gestational age estimates. (ekstern lenke)

2022

• Karolina Sofia Mæland; Nils-Halvdan Morken; Erica Schytt et al. (2022). Rsik of Recurrent Preeclampsia by Maternal Region of Birth: A Nationwide Population-based Study. (ekstern lenke)
• Yeneabeba Sima; Rolv Skjaerven; Liv Grimstvedt Kvalvik et al. (2022). Cesarean delivery in Norwegian nulliparous women with singleton cephalic term births, 1967–2020: a population-based study. (ekstern lenke)
• Camilla Haavaldsen; Nils-Halvdan Morken; Ola Didrik Saugstad 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. (ekstern lenke)
• Anne Kvie Sande; Erik Andreas Torkildsen; Ragnar Sande 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. (ekstern lenke)
• Mari Haaland Sagstad; Nils-Halvdan Morken; Agnethe Lund et al. (2022). Quantitative User Data From a Chatbot Developed for Women With Gestational Diabetes Mellitus: Observational Study. (ekstern lenke)
• Tone Engen; Katrine Mari Owe; Julie Horn 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. (ekstern lenke)
• Prativa Basnet; Rolv Skjaerven; Linn Marie Sørbye et al. (2022). Long-term cardiovascular mortality in women with twin pregnancies by lifetime reproductive history. (ekstern lenke)

2014

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

2011

• Nils-Halvdan Morken; Nina Gunnes; Per Magnus 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. (ekstern lenke)
• Nils-Halvdan Morken; Kari Klungsøyr Melve; Rolv Skjaerven (2011). Recurrence of prolonged and post-term gestational age across generations: maternal and paternal contribution. (ekstern lenke)
• Solveig Myking; Ronny Myhre; Håkon Gjessing 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. (ekstern lenke)
• Nils-halvdan Morken (2011). Preterm delivery in IVF versus ICSI singleton pregnancies: a national population-based cohort. (ekstern lenke)

2019

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

2012

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

2010

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

2013

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

2021

• Maria Christine Magnus; Nils-Halvdan Morken; Knut-Arne Wensaas et al. (2021). Risk of miscarriage in women with chronic diseases in Norway: A registry linkage study. (ekstern lenke)
• Camilla Haavaldsen; Nils-Halvdan Morken; Anne Eskild (2021). Antall induksjoner øker – har det noen betydning for utfallet?. (ekstern lenke)
• Camilla Haavaldsen; Nils-Halvdan Morken; Anne Eskild (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.. (ekstern lenke)
• Karolina Sofia Mæland; Nils-Halvdan Morken; Schytt Erica et al. (2021). Abruptio placentae hos innvandrerkvinner – en populasjonsstudie med data fra Medisinsk fødselsregister. (ekstern lenke)
• Maria Christine Magnus; Alexandra Havdahl; Nils-Halvdan Morken et al. (2021). Risk of miscarriage in women with psychiatric disorders. (ekstern lenke)
• Karolina Sofia Mæland; Nils-Halvdan Morken; Vigdis Aasheim et al. (2021). Complications during pregnancy and childbirth in immigrant women giving birth in Norway. (ekstern lenke)
• Karolina Sofia Mæland; Nils-Halvdan Morken; Erica Schytt et al. (2021). Placental Abruption by Maternal Country of Birth: a nationwide population-based study. (ekstern lenke)
• Karolina S. Mæland; Nils-Halvdan Morken; Erica Schytt et al. (2021). Obstetric outcomes in immigrant women in Norway. (ekstern lenke)
• Karolina Sofia Mæland; Nils-Halvdan Morken; Erica Schytt et al. (2021). Pregnancy Outcomes in Immigrant Women in Norway. (ekstern lenke)

2006

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

2009

• Bo Jacobsson; Riikka Aaltonen; Kaisu Rantakokko-Jalava 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. (ekstern lenke)

2017

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

2008

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

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