2026

• Seljeflot, Eline Bragedatter; Mørch, Hanne; Eggebø, Torbjørn Moe; Opdahl, Signe; Saravelos, Sotirios; Westvik-Johari, Kjersti; Kahrs, Birgitte Heiberg. (2026) Fetal Growth in Pregnancies Conceived by Single Embryo Transfer: A Prospective Observational Cohort Study During Three Trimesters. Reproductive, Female and Child Health (RFCH)
  Academic article

2025

• Landsverk, Eirik; Westvik-Johari, Kjersti; Wennerholm, Ulla-Britt; Bergh, Christina; Kyhl, Frederik; Spangmose, Anne Lærke; Vassard, Ditte; Pinborg, Anja; Rönö, Kristiina; Gissler, Mika. (2025) Risk of placenta previa in assisted reproductive technology: A Nordic population study with sibling analyses. PLoS Medicine
  Academic article
• Seljeflot, Eline Bragedatter; Mørch, Hanne; Eggebø, Torbjørn Moe; Opdahl, Signe; Saravelos, Sotirios; Schilling, Hanna Julia; Westvik-Johari, Kjersti; Kahrs, Birgitte Heiberg. (2025) First Trimester Fetal Growth in Pregnancies After Single Embryo Transfer: A Prospective Longitudinal Observational Study Comparing Embryo Size to Established Growth Curves. Reproductive, Female and Child Health (RFCH)
  Academic article

2024

• Seljeflot, Eline Bragedatter; Mørch, Hanne; Eggebø, Torbjørn Moe; Opdahl, Signe; Saravelos, Sotirios; Schilling, Hanna Julia; Westvik-Johari, Kjersti; Kahrs, Birgitte Heiberg. (2024) Fostervekst i første trimester i svangerskap etter assistert befruktning. Gynekologen
  Conference abstract
• Seljeflot, Eline Bragedatter; Mørch, H.; Eggebø, Torbjørn Moe; Saravelos, S.; Opdahl, Signe; Schilling, H.; Westvik-Johari, Kjersti; Kahrs, Birgitte Heiberg. (2024) Abstracts of the 34th World Congress on Ultrasound in Obstetrics and Gynecology, 15-18 September 2024, Budapest, Hungary. Ultrasound in Obstetrics and Gynecology
  Conference abstract
• Kyhl, Frederik; Spangmose, Anne Lærke; Gissler, Mika; Rönö, Kristiina; Westvik-Johari, Kjersti; Henningsen, Anna-Karina Aaris; Bergh, Christina; Wennerholm, Ulla-Britt; Opdahl, Signe; Forman, Julie. (2024) The risk of Type 1 diabetes in children born after ART: a Nordic cohort study from the CoNARTaS group. Human Reproduction Open
  Academic article

2023

• Carlsen, Henriette; Vik, Torstein; Andersen, Guro Lillemoen; Stangenes, Kristine Marie; Bjellmo, Solveig; Westvik-Johari, Kjersti; Hollung, Sandra Julsen. (2023) Cerebral palsy in children born after assisted reproductive technology in Norway: Risk, prevalence, and clinical characteristics. Acta Obstetricia et Gynecologica Scandinavica
  Academic article
• Westvik-Johari, Kjersti; Håberg, Siri Eldevik; Lawlor, Deborah A.; Romundstad, Liv Bente Bergem; Bergh, Christina; Wennerholm, Ulla-Britt; Gissler, Mika; Henningsen, Anna-Karina A.; Tiitinen, Aila; Pinborg, Anja. (2023) The challenges of selective fertility and carryover effects in within-sibship analyses: the effect of assisted reproductive technology on perinatal mortality as an example. International Journal of Epidemiology
  Academic article
• Landsverk, Eirik; Westvik-Johari, Kjersti; Romundstad, Liv Bente Bergem; Opdahl, Signe. (2023) Birth size after embryo cryopreservation: larger by all measures?. Human Reproduction
  Academic article

2022

• Westvik-Johari, Kjersti; Lawlor, Deborah; Romundstad, Liv Bente Bergem; Bergh, Christina; Wennerholm, Ulla-Britt; Gissler, Mika; Henningsen, Anna-Karina Aaris; Håberg, Siri Eldevik; Tiitinen, Aila; Spangmose, Anne Lærke. (2022) Risk of stillbirth and neonatal death in singletons born after fresh and frozen embryo transfer: cohort study from the Committee of Nordic Assisted Reproduction Technology and Safety. Fertility and Sterility
  Academic article
• Petersen, Sindre Hoff; Westvik-Johari, Kjersti; Spangmose, Anne Lærke; Pinborg, Anja Bisgaard; Romundstad, Liv Bente Bergem; Bergh, Christina; Åsvold, Bjørn Olav; Gissler, Mika; Tiitinen, Aila; Wennerholm, Ulla-Britt. (2022) Risk of Hypertensive Disorders in Pregnancy After Fresh and Frozen Embryo Transfer in Assisted Reproduction: A Population-Based Cohort Study With Within-Sibship Analysis. Hypertension
  Academic article

2021

• Westvik-Johari, Kjersti; Romundstad, Liv Bente; Lawlor, Deborah A.; Bergh, Christina; Gissler, Mika; Henningsen, Anna-Karina A.; Håberg, Siri Eldevik; Wennerholm, Ulla-Britt; Tiitinen, Aila; Pinborg, Anja. (2021) Separating parental and treatment contributions to perinatal health after fresh and frozen embryo transfer in assisted reproduction: A cohort study with within-sibship analysis. PLoS Medicine
  Academic article