Academic article

• Emma Nordtvedt; Jørg Kessler; Cathrine Ebbing et al. (2025). Placental and cerebral circulation in fetuses of mothers with polycystic ovary syndrome and the effect of Metformin exposure. (external link)
• Julie Sletten; Agnethe Lund; Cathrine Ebbing et al. (2019). The fetal circadian rhythm in pregnancies complicated by pregestational diabetes is altered by maternal glycemic control and the morning cortisol concentration. (external link)
• Sindre Grindheim; Cathrine Ebbing; Henriette Odland Karlsen et al. (2022). Metformin exposure, maternal PCOS status and fetal venous liver circulation: A randomized, placebo-controlled study. (external link)
• Elisabeth Berge Budal; Mariann Bentsen; Jørg Kessler et al. (2023). Histologic chorioamnionitis in extremely preterm births, microbiological findings and infant outcome. (external link)
• J Kessler; Svein Arvid Rasmussen; M Hanson et al. (2006). Longitudinal reference ranges for ductus venosus flow velocities and waveform indices. (external link)
• Jørg Kessler; Dag Moster; Susanne Albrechtsen (2015). Intrapartum monitoring with cardiotocography and ST-waveform analysis in breech presentation: An observational study. (external link)
• Elisabeth Berge Budal; Jørg Kessler; Geir Egil Eide et al. (2024). Placental pathology and neonatal morbidity: exploring the impact of gestational age at birth. (external link)
• Jørg Kessler; Svein Rasmussen; Keith Godfrey et al. (2011). Venous liver blood flow and regulation of human fetal growth: evidence from macrosomic fetuses. (external link)
• Sindre Grindheim; Franziska Siafarikas; Ingrid Volløyhaug et al. (2026). Pelvic floor symptoms one year postpartum following forceps and vacuum deliveries: Impact of levator ani muscle avulsion. (external link)
• Tom Roar Omdal; Muhammad Umael Khan; Britt Engan et al. (2025). Left ventricular myocardial strain in neonates is influenced by the definition of the basal region of interest. (external link)
• Lorentz Erland Linde; Cathrine Ebbing; Dag Moster et al. (2022). Recurrence of postpartum hemorrhage, maternal and paternal contribution, and the effect of offspring birthweight and sex: a population-based cohort study. (external link)
• Gerard H.A. Visser; Jørg Kessler (2014). It is time to introduce ST analysis for fetal monitoring in the labor ward?. (external link)
• Jörg Kessler; Svein Arvid Rasmussen; Keith Godfrey et al. (2009). Fetal growth restriction is associated with prioritization of umbilical blood flow to the left hepatic lobe at the expense of the right lobe. (external link)
• Cathrine Ebbing; Jørg Kessler; Dag Moster et al. (2019). Isolated single umbilical artery and the risk of adverse perinatal outcome and third stage of labor complications: A population-based study.. (external link)
• Jørg Kessler; Svein Rasmussen; Keith M. Godfrey et al. (2008). Longitudinal Study of Umbilical and Portal Venous Blood flow to the Fetal Liver: Low Pregnancy Weight Gain is Associated With Preferential Supply to the Fetal Left Liver Lobe. (external link)
• Torvid Kiserud; J Kessler; C Ebbing et al. (2006). Ductus venosus shunting in growth-restricted fetuses and the effect of umbilical circulatory compromise. (external link)
• Lorentz Erland Linde; Svein Rasmussen; Jørg Kessler et al. (2018). Extreme umbilical cord lengths, cord knot and entanglement: Risk factors and risk of adverse outcomes, a population-based study. (external link)
• J Kessler; Svein Arvid Rasmussen; T Kiserud (2007). The left portal vein as an indicator of watershed in the fetal circulation: development during the second half of pregnancy and a suggested method of evaluation. (external link)
• Agnethe Lund; Cathrine Ebbing; Svein Rasmussen et al. (2018). Maternal diabetes alters the development of ductus venosus shunting in the fetus. (external link)
• Jørg Kessler; Synnøve Lian Johnsen; Cathrine Ebbing et al. (2018). Estimated date of delivery based on second trimester fetal head circumference: A population-based validation of 21 451 deliveries. (external link)
• Elisabeth Berge Budal; Cathrine Ebbing; Jørg Kessler et al. (2021). Placental histology predicted adverse outcomes in extremely premature neonates in Norway-population-based study. (external link)
• Agnethe Lund; Cathrine Ebbing; Svein Rasmussen et al. (2021). Pre-gestational diabetes: Maternal body mass index and gestational weight gain are associated with augmented umbilical venous flow, fetal liver perfusion, and thus birthweight. (external link)
• Johannes Kjartansson Mørch; Elisabeth Horne Kolnes; Gottfried Greve et al. (2024). Increasing region of interest width reduces neonatal circumferential strain. (external link)
• Muhammad Umael Khan; Tom Roar Omdal; Cathrine Ebbing et al. (2025). The Effect of Smoothing and Drift Compensation on Fetal Strain. (external link)
• Michael Robson; Gillian A. Corbett; Jørg Kessler et al. (2025). An Intrapartum Cesarean Delivery Classification System – a prospective eighteen year longitudinal cohort study. (external link)
• Cathrine Ebbing; Svein Rasmussen; Jørg Kessler et al. (2022). Association of placental and umbilical cord characteristics with cerebral palsy: a national cohort study. (external link)
• Lorentz Erland Linde; Cathrine Ebbing; Dag Moster et al. (2021). Recurrence of postpartum hemorrhage in relatives: A population-based cohort study. (external link)
• Magnus Bollum Berge; Anne Flem Jacobsen; Branka Markovic Yli et al. (2025). A direct comparison of the diagnostic accuracy of ST segment analysis (STAN) and fetal scalp blood sample lactate: A population-based observational study. (external link)
• Tom Roar Omdal; Muhammad Umael Khan; Cathrine Ebbing et al. (2022). The influence of region of interest width in fetal 2D-speckle tracking echocardiography late in pregnancy. (external link)
• Alexander Vietheer; Torvid Kiserud; Cathrine Ebbing et al. (2023). Maternal physical activity affects yolk sac size and growth in early pregnancy, but girls and boys use different strategies. (external link)
• Cathrine Ebbing; Jørg Kessler; Dag Moster et al. (2019). Single umbilical artery and risk of congenital malformations: a population-based study in Norway.. (external link)
• Agnethe Lund; Cathrine Ebbing; Svein Rasmussen et al. (2019). Altered development of fetal liver perfusion in pregnancies with pregestational diabetes. (external link)
• Birgitte Eide; Ragnar Sande; Brandis Philip Von et al. (2024). Associations between fetal position at delivery and duration of active phase of labor: A historical cohort study. (external link)
• Susana Pereira; Petra Bakker; Ahmed Zaima et al. (2023). Is the fetus fit for labor? Introducing fast-and-frugal trees (FFTrees) to simplify triage of women for STAN monitoring: An interobserver agreement comparison with traditional classification. (external link)
• Torvid Kiserud; Jørg Kessler; Cathrine Ebbing et al. (2006). Ductus venosus shunting in growth-restricted fetuses and the effect of umbilical circulatory compromise. (external link)
• Ine Hildershavn Moen; Marit Gudlaug Kiperberg; Jørg Kessler et al. (2025). Er identifisering av navlesnorfestet ved rutineultralyd-undersokelse i 1. og 2. trimester gjennomforbart?. (external link)
• Sindre Grindheim; Johanne Kolvik von Ely Iversen; Stig Hill et al. (2025). Reverse Løvset maneuver for shoulder dystocia. (external link)
• Fride Efjestad Austad; Jørg Kessler; Elisabeth Balstad Magnussen et al. (2025). Outpatient Versus Inpatient Induction of Labour With Oral Misoprostol: A Multicentre Randomised-Controlled Trial. (external link)
• Alexander Vietheer; Torvid Kiserud; Øystein Ariansen Haaland et al. (2022). Effect of maternal sleep on embryonic development. (external link)
• Branislava Markovic Yli; Jørg Kessler; Torunn Eikeland et al. (2012). What is the gold standard for intrapartum fetal monitoring?. (external link)
• Tilde Broch Østborg; Ragnar Sande; Jørg Kessler et al. (2022). Put your weight behind it—Effect of body mass index on the active second stage of labour: A retrospective cohort study. (external link)
• Cathrine Ebbing; Anne Halmøy; Svein Rasmussen et al. (2025). Umbilical cord length and neurodevelopmental disorders, a national cohort study. (external link)
• Magnus Bollum Berge; Jørg Kessler; Branislava Markovic Yli et al. (2023). Neonatal outcomes associated with time from a high fetal blood lactate concentration to operative delivery. (external link)
• Sindre Grindheim; Ingrid Volløyhaug; Franziska Siafarikas et al. (2025). Impact of delivery indication on levator ani muscle avulsion in forceps- and vacuum-assisted deliveries: prospective cohort study. (external link)
• Jørg Kessler; Christian Tappert; Janne Rossen et al. (2025). Implementation of the Intrapartum Cesarean Delivery Classification System: a prospective observational study. (external link)
• Øystein Bergøy; Torvid Kiserud; Jørg Kessler et al. (2024). Ultrasound visualization and blood flow velocity measurements of the adrenal arteries in the fetus. (external link)
• Siw Helen Eger; Jørg Kessler; Torvid Kiserud et al. (2015). Foetal Doppler abnormality is associated with increased risk of sepsis and necrotising enterocolitis in preterm infants. (external link)
• Jørg Kessler; Svein Rasmussen; Torvid Kiserud (2007). The fetal portal vein: normal blood flow development during the second half of human pregnancy. (external link)
• Lorentz Erland Linde; Svein Rasmussen; Dag Moster et al. (2022). Risk factors and recurrence of cause-specific postpartum hemorrhage: A population-based study. (external link)
• Alexander Vietheer; Torvid Kiserud; Rolv Terje Lie et al. (2021). Sleep and physical activity from before conception to the end of pregnancy in healthy women: a longitudinal actigraphy study. (external link)
• Torvid Kiserud; C Ebbing; J Kessler et al. (2006). Fetal cardiac output, distribution to the placenta and impact of placental compromise. (external link)
• Sindre Grindheim; Svein Rasmussen; Johanne Kolvik von Ely Iversen et al. (2025). Influence of instrument choice on fear of childbirth after assisted vaginal delivery: A secondary analysis of the Bergen birth study. (external link)
• Jørg Kessler; Dag Moster; Susanne Albrechtsen (2013). Intrapartum monitoring of high-risk deliveries with ST analysis of the fetal electrocardiogram: an observational study of 6010 deliveries. (external link)
• Julie Sletten; Germaine Cornélissen; Jörg Assmus et al. (2018). Maternal exercise, season and sex modify the daily fetal heart rate rhythm. (external link)
• Jørg Kessler; Dag Moster; Susanne Albrechtsen (2014). Delay in intervention increases neonatal morbidity in births monitored with cardiotocography and ST-waveform analysis. (external link)
• Julie Sletten; Jørg Kessler (2015). QRS abnormalities of the fetal electrocardiogram, and their implications for ST-interval analysis during labor. (external link)
• Julie Sletten; Torvid Kiserud; Jørg Kessler (2016). Effect of uterine contractions on fetal heart rate in pregnancy: a prospective observational study. (external link)
• Magnus Berge; Jørg Kessler; Annetine Staff et al. (2025). The diagnostic accuracy of different fetal blood sample lactate cutoffs in labor, utilizing the StatStrip Xpress® lactate-meter: A population-based observational study. (external link)

Letter to the editor

• Lawrence Devoe; Per Olofsson; Diogo Ayres-De-Campos et al. (2014). On the evidence for intrapartum fetal monitoring with ECG-ST analysis. (external link)
• Cathrine Ebbing; Synnøve Lian Johnsen; Jørg Kessler et al. (2015). Helsedirektoratet gir feil anbefaling om bestemmelse av fosteralder. (external link)
• Torvid Kiserud; Jørg Kessler; Cathrine Ebbing et al. (2007). Re: Ductus venosus shunting in growth-restricted fetuses and the effect of umbilical circulatory compromise - Reply. (external link)
• Cathrine Ebbing; Svein Rasmussen; Jørg Kessler (2019). True Cord Knot Means True Fetal Risk - Comment on the Title Image of Ultraschall in Med 2018; 39(02):127-128.. (external link)
• Jørg Kessler; Torbjørn Moe Eggebø; Anne Flem Jacobsen et al. (2022). Can a population study assess the impact of fetal monitoring technology?. (external link)
• Jørg Kessler; Branislava Markovic Yli (2013). Admission CTG, is there any evidence from which to draw conclusions?. (external link)
• Jørg Kessler; Branislava Markovic Yli; Heidi Overrein et al. (2022). Ingen grunn til endring av anbefalinger om fosterovervåkning. (external link)
• Jørg Kessler; Sindre Grindheim; Johanne Kolvik von Ely Iversen (2024). The conclusion of CTG overuse is not justified. (external link)
• Jørg Kessler; Branislava Markovic Yli (2016). Biphasic ST should not be omitted from STAN clinical guidelines. (external link)
• Jørg Kessler; Branislava Markovic Yli; Babill Stray-Pedersen et al. (2016). Why did the authors perform a meta-analysis of studies with primary endpoints they consider clinically unimportant?. (external link)
• Sindre Grindheim; Svein Rasmussen; Johanne Kolvik von Ely Iversen et al. (2025). Instrument selection in assisted vaginal delivery, when spontaneous vaginal delivery is no longer an option. (external link)

Research report

• Pål Øian; Anne Flem Jacobsen; Jørg Kessler (2014). Veileder i fødselshjelp 2014. (external link)

Conference abstract

• Jørg Kessler; Svein Rasmussen; K Godfrey et al. (2005). Umbilical and portal blood flow in the 2nd and 3rd trimester - a longitudinal study in low-risk pregnancies. (external link)
• J Sletten; Jørg Kessler; Torvid Kiserud (2012). Is the fetal heart rate affected by uterine contractions during pregnancy? A pilot study. (external link)
• Jørg Kessler; Torvid Kiserud; Susanne Albrechtsen (2012). Intrapartum use of ST analysis of the fetal ECG (STAN) in fetal growth restriction. (external link)
• Tilde Broch Østborg; Ragnar Sande; Jørg Kessler et al. (2022). Bruk vekta - effekten av kroppsmasseindeks på trykketida. (external link)
• Emma Nordtvedt; Jørg Kessler; Ganesh Acharya et al. (2022). Doppler indices of placental and cerebral vascular impedance in fetuses of mothers with PCOS and the effect of metformin exposure. (external link)
• Birte Haugland; Susanne Albrechtsen; Eva Karin Lamark et al. (2012). Induction of labor with single- versus double-balloon catheter - a randomized controlled trial. (external link)
• Jørg Kessler; Susanne Albrechtsen; Kåre Augensen (2012). Rotation with Kiellands forceps - a safe alternative for delivery in trained hands. (external link)
• Emma Nordtvedt; Jørg Kessler; Ganesh Prasad Acharya et al. (2022). Doppler indices of placental and cerebral vascular impedance in fetuses of mothers with PCOS and the effect of metformin exposure. (external link)
• Jørg Kessler; Susanne Albrechtsen; Torvid Kiserud (2012). Management of fetal growth restriction at >= 36 weeks of gestation - what can be achieved by careful fetal monitoring?. (external link)
• Øystein Bergøy; Torvid Kiserud; Ingvild Dalen et al. (2024). Longitudinal reference range for the pulsatility index of fetalinferior adrenal arteries - Abstracts of the 34th World Congress on Ultrasound in Obstetrics and Gynecology, 15-18 September 2024, Budapest, Hungary. (external link)
• Jørg Kessler; Svein Rasmussen; Keith M. Godfrey et al. (2007). Longitudinal study of umbilical and portal venous blood flow to the human fetal liver: low pregnancy weight gain is associated with preferential supply to the left liver lobe. (external link)

Journal corrigendum

• Alexander Vietheer; Torvid Kiserud; Øystein Ariansen Haaland et al. (2024). Correction to: Effect of maternal sleep on embryonic development (Scientific Reports, (2022), 12, 1, (17099), 10.1038/s41598-022-21516-6). (external link)
• Alexander Vietheer; Torvid Kiserud; Rolv T. Lie et al. (2023). Corrigendum to “Sleep and physical activity from before conception to the end of pregnancy in healthy women: A longitudinal actigraphy study” [Sleep Med 83 (2021) 89–98, (S1389945721002525), (10.1016/j.sleep.2021.04.028)]. (external link)

Conference lecture

• Emma Nordtvedt; Jørg Kessler; Ganesh Acharya et al. (2022). Doppler indices of placental and cerebral vascular impedance in fetuses of mothers with PCOS and the effect of metformin exposure. (external link)
• Jørg Kessler; Svein Rasmussen; Torvid Kiserud (2005). Blutflussvolumen der fetalen Pfrtader im 2. und 3. Trimenon - eine langitudinelle Studie im Nidrigrisikokollektiv. (external link)
• Emma Nordtvedt; Jørg Kessler; Ganesh Prasad Acharya et al. (2022). Doppler indices of placental and cerebral vascular impedance in fetuses of mothers with PCOS and the effect of metformin exposure. (external link)
• BM Eide; Ragnar Sande; Jørg Kessler et al. (2023). Duration of active second stage of labor in nulliparous women by fetal head position. (external link)
• Tilde Broch Østborg; Ragnar Sande; Jørg Kessler et al. (2022). Bruk vekta - effekten av kroppsmasseindeks på trykketida. (external link)

Doctoral thesis (PhD)

• Jørg Kessler (2007). Portal and umbilical venous distribution in the human fetus : a longitudinal ultrasound study. (external link)
• Agnethe Lund; Jørg Kessler (2019). Maternal diabetes mellitus and fetal venous liver flow – a longitudinal study. (external link)
• Julie Sletten; Jørg Kessler (2018). Circadian rhythms of the fetal heart rate and heart rate variation in low-risk and pre-gestational diabetic pregnancies. Studies on long-term antenatal cardiotocographic recordings. (external link)

Non-fiction book chapter

• Jørg Kessler; Ganesh Acharya; Guttorm Haugen et al. (1998). Ultralydundersøkelser i den alminnelige svangerskapsomsorgen. (external link)

Study protocol

• Ingvil Krarup Sørbye; Nina Gunnes; Aslak Vimme Solhoff et al. (2025). Multicentre double-blind randomised placebo-controlled four-arm trial to assess the effect of oral sodium bicarbonate and intravenous hyoscine butylbromide on spontaneous delivery after induction of labour in nulliparous women: Protocol for the Safe Induction of Labour Trial (SAINT). (external link)

Editorial/Leader article

• Jelle Hendrik Baalman; Thomas Bergholt; Ana Pilar Betran Lazaga et al. (2024). Prospective Structured Perinatal Audit and the Ten Group Classification System: Essential for understanding and improving childbirth. (external link)

Academic literature review

• Morgan D. Peel; Doortje M. R. Croll; Jørg Kessler et al. (2023). Double-vs single-balloon catheter for induction of labor: Systematic review and individual participant data meta-analysis. (external link)
• Per Olofsson; Diogo Ayres-De-Campos; Jørg Kessler et al. (2014). A critical appraisal of the evidence for using cardiotocography plus ECG ST interval analysis for fetal surveillance in labor. Part II: The meta-analyses. (external link)
• Per Olofsson; Diogo Ayres-De-Campos; Jørg Kessler et al. (2014). A critical appraisal of the evidence for using cardiotocography plus ECG ST interval analysis for fetal surveillance in labor. Part I: The randomized controlled trials. (external link)
• Marte Christine Jettestad; Hjalmar A. Schiøtz; Branislava Markovic Yli et al. (2019). Fetal monitoring in term breech labor – a review. (external link)

See a complete overview of publications in NVA.