Browsing NTNU Open by Author "Westvik-Johari, Kjersti"
Now showing items 1-7 of 7
-
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 ... -
Cerebral palsy in children born after assisted reproductive technology in Norway: Risk, prevalence, and clinical characteristics
Carlsen, Henriette; Vik, Torstein; Andersen, Guro Lillemoen; Stangenes, Kristine Marie; Bjellmo, Solveig; Westvik-Johari, Kjersti; Hollung, Sandra Julsen (Peer reviewed; Journal article, 2023)Introduction The aim was to investigate the risk, prevalence, and clinical characteristics of cerebral palsy among children born after assisted reproductive technology (ART) in Norway. Material and methods All ... -
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 ... -
Perinatal outcomes after assisted reproductive technology. Are adverse perinatal outcomes after assisted reproductive technology affected by mode of treatment or maternal factors?
Westvik-Johari, Kjersti (Doctoral theses at NTNU;2022:100, Doctoral thesis, 2022)Norsk sammendrag Perinatale utfall etter assistert befruktning. Er dårligere perinatal helse etter assistert befruktning et resultat av behandlingsmetode eller faktorer hos mor? Barn født etter assistert befruktning ... -
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 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%) ... -
Separating parental and treatment contributions to perinatal health after fresh and frozen embryo transfer in assisted reproduction: A cohort study with within-sibship analysis
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; Opdahl, Signe (Peer reviewed; Journal article, 2021)Background Compared to naturally conceived children, adverse perinatal outcomes are more common among children born after assisted reproductive technology with fresh embryo transfer (fresh-ET) or frozen embryo transfer ...