In October 2016, the UMCG - in collaboration with Lifelines - started a study in which pregnant women and their children are followed during and after the pregnancy. This is done under the name Lifelines NEXT. The aim of this research is to find out why one person has to deal with chronic illnesses and not others. It is suspected that this has already been determined during pregnancy. Olaf, the first Lifelines NEXT baby, recently celebrated his first birthday. Even before he was born, he and his mother participated in this scientific research into the health of mothers and children.