We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSecular trends in gestational age and birthweight in twins.AuthorsGielen, M.; van Beijsterveldt, C. E. M.; Derom, C.; Vlietinck, R.; Nijhuis, J. G.; Zeegers, M. P. A.; Boomsma, D. I.PublicationHuman Reproduction, 2010, Vol 25, Issue 9, p2346ISSN0268-1161Publication typearticleDOI10.1093/humrep/deq160