Browsing NTNU Open by Author "Romundstad, Liv Bente Bergem"
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Birth size after embryo cryopreservation: larger by all measures?
Landsverk, Eirik; Westvik-Johari, Kjersti; Romundstad, Liv Bente Bergem; Opdahl, Signe (Peer reviewed; Journal article, 2023)STUDY QUESTION Are the changes in birthweight after frozen and fresh embryo transfer associated with corresponding changes in other measures of foetal growth and placental efficiency? SUMMARY ANSWER Although placental ... -
Cancer in children born after frozen-thawed embryo transfer: A cohort study
Sargisian, Nona; Lannering, Birgitta; Petzold, Max; Opdahl, Signe; Gissler, Mika; Pinborg, Anja; Henningsen, Anna-Karina Aaris; Tiitinen, Aila; Romundstad, Liv Bente Bergem; Spangmose, Anne Lærke; Bergh, Christina; Wennerholm, Ulla-Britt (Journal article; Peer reviewed, 2022) -
The challenges of selective fertility and carryover effects in within-sibship analyses: the effect of assisted reproductive technology on perinatal mortality as an example
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; Opdahl, Signe (Peer reviewed; Journal article, 2023)Background Within-sibship analyses show lower perinatal mortality after assisted reproductive technology (ART) compared with natural conception (NC), a finding that appears biologically unlikely. We investigated whether ... -
Data resource profile: the Committee of Nordic Assisted Reproductive Technology and Safety (CoNARTaS) cohort
Opdahl, Signe; Henningsen, Anna-Karina Aaris; Bergh, Christina; Gissler, Mika; Romundstad, Liv Bente Bergem; Petzold, Max; Tiitinen, Aila; Wennerholm, Ulla-Britt; Pinborg, Anja (Journal article; Peer reviewed, 2019) -
The neurodevelopmental morbidity of children born after assisted reproductive technology: a Nordic register study from the Committee of Nordic Assisted Reproductive Technology and Safety group
Rönö, Kristiina; Rissanen, Essi; Bergh, Christina; Wennerholm, Ulla-Britt; Opdahl, Signe; Romundstad, Liv Bente Bergem; Henningsen, Anna-Karina Aaris; Spangmose, Anne Lærke; Pinborg, Anja; Gissler, Mika; Tiitinen, Aila (Peer reviewed; Journal article, 2022)Objective To assess the risk of neurodevelopmental disorders in singletons born after the use of assisted reproductive technology (ART) compared with singletons born without the use of ART. Design Nordic register-based ... -
Puberty disorders among ART-conceived singletons: a Nordic register study from the CoNARTaS group
Klemetti, R.; Perry, B.; Henningsen, A K Aaris; Spangmose, A Lærke; Pinborg, A.; Opdahl, Signe; Romundstad, Liv Bente Bergem; Bergh, C.; Wennerholm, U.B.; Tiitinen, A.; Gissler, M. (Peer reviewed; Journal article, 2022)STUDY QUESTION Do ART-conceived children have an increased risk for puberty disorders? SUMMARY ANSWER Both ART-conceived boys and girls had a higher risk of puberty disorders; early puberty was more common among girls ... -
Risk of Hypertensive Disorders in Pregnancy After Fresh and Frozen Embryo Transfer in Assisted Reproduction: A Population-Based Cohort Study With Within-Sibship Analysis
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; Opdahl, Signe (Peer reviewed; Journal article, 2022)Background: Frozen embryo transfer (frozen-ET) is increasingly common because of improved cryopreservation methods and elective freezing of all embryos. Frozen-ET is associated with higher risk of hypertensive disorders ... -
Risk of ovarian cancer in women who give birth after assisted reproductive technology (ART)—a registry-based Nordic cohort study with follow-up from first pregnancy
Sandvei, Marie Søfteland; Pinborg, Anja; Gissler, Mika; Bergh, Christina; Romundstad, Liv Bente Bergem; van Leeuwen, Flora E.; Spaan, Mandy; Tiitinen, Aila; Wennerholm, Ulla-Britt; Henningsen, Anna-Karina; Opdahl, Signe (Peer reviewed; Journal article, 2022)Background There is concern that assisted reproductive technology (ART) may increase ovarian cancer risk, but previous studies are inconclusive. We compared ovarian cancer risk for women who gave birth after ART vs ... -
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
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; Pinborg, Anja Bisgaard; Opdahl, Signe (Peer reviewed; Journal article, 2022)Main Outcome Measure(s) Stillbirth (fetal death before and during delivery) and neonatal death (live born with death 0–27 days postpartum). Result(s) Overall, 17,123 (0.37%) singletons were stillborn and 7,685 (0.17%) ... -
Risk of stroke the year following a delivery after using assisted reproductive technologies
Magnus, Maria Christine; Håberg, Siri Eldevik; Rönö, Kristiina; Romundstad, Liv Bente Bergem; Bergh, Christina; Spangmose, Anne Lærke; Pinborg, Anja; Gissler, Mika; Wennerholm, Ulla-Britt; Opdahl, Signe (Peer reviewed; Journal article, 2023)Background Studies indicate that individuals who deliver after assisted reproductive technologies (ART) may have an increased risk of cardiovascular disease (CVD). A recent large study from the U.S. showed a higher risk ... -
Vanishing twin syndrome among ART singletons and pregnancy outcomes
Magnus, Maria Christine; Ghaderi, Sara; Morken, Nils-Halvdan; Magnus, Per; Romundstad, Liv Bente Bergem; Skjaerven, Rolv; Wilcox, Allen J; Håberg, Siri Eldevik (Journal article; Peer reviewed, 2017)STUDY QUESTION Among babies born by ART, do singleton survivors of a vanishing twin have lower birth weight than other singletons? SUMMARY ANSWER Vanishing twin syndrome (VTS) was associated with lower birth weight among ... -
Women undergoing assisted fertilisation and high-intensity interval training: a pilot randomised controlled trial
Kiel, Ida Almenning; Lundgren, Kari Margrethe; Mørkved, Siv; Kjøtrød, Sigrun Beate; Salvesen, Øyvind; Romundstad, Liv Bente Bergem; Moholdt, Trine (Journal article; Peer reviewed, 2018)Objectives Overweight and obese women often seek assisted fertilisation. In the obese population, pregnancy rates are 30%–75% below that of normal weight women who undergo assisted fertilisation. We hypothesised that ...