Abstract

The Norwegian Mother and Child Cohort Study (MoBa) was planned in the 1990s partly by researchers at the Medical Birth Registry of Norway (MBRN) 1 and partly by researchers at the National Institute of Public Health (from 2002 comprising MBRN as well as other institutions and renamed the Norwegian Institute of Public Health (NIPH). The study had a long planning phase involving many scientists who contributed ideas that helped to design questionnaires and to structure the biobank, which is described in detail elsewhere. 2 Collaboration was established with the Danish Birth Cohort Study, 3