• Risk of adverse pregnancy outcomes in twin- and singleton-born women: An inter-generational cohort study 

      Basnet, Prativa; Skjaerven, Rolv; Harmon, Quaker E.; Sørbye, Linn Marie; Morken, Nils-Halvdan; Singh, Aditi; Klungsøyr, Kari; Kvalvik, Liv Grimstvedt (Journal article; Peer reviewed, 2024)
      Objective To compare the risk of adverse pregnancy outcomes between twin-born and singleton-born women. We also evaluated whether in utero exposure to pre-eclampsia or preterm delivery affected adverse pregnancy outcomes ...
    • Sex differences in parent–offspring recurrence of attention-deficit/hyperactivity disorder 

      Solberg, Berit Skretting; Hegvik, Tor-Arne; Halmøy, Anne; Skjaerven, Rolv; Engeland, Anders; Haavik, Jan; Klungsøyr, Kari (Journal article; Peer reviewed, 2020)
      Background Attention-deficit/hyperactivity disorder (ADHD) is a highly heritable neurodevelopmental disorder sharing genetic risk factors with other common psychiatric disorders. However, intergenerational recurrence ...
    • 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 (Peer reviewed; Journal article, 2017-11)
      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's prepregnancy lipid levels and number of children: a Norwegian prospective population-based cohort study 

      Pirnat, Aleksandra; deRoo, Lisa; Skjaerven, Rolv; Morken, Nils-Halvdan (Peer reviewed; Journal article, 2018)
      Objective. To study prepregnancy serum lipid levels and the association with the number of children. Design. Prospective, population-based cohort. Setting. Linked data from the Cohort of Norway and the Medical Birth Registry ...