 Patient enrollment. The participants will be recruited from the Department of Obstetrics, Rigshospitalet, Denmark, from July 2016 to March 2019. Participants will be selected on the basis of 1 the information provided by the participants general practitioner and 2 an electronic questionnaire received by email and completed by all pregnant women registered to give birth at Rigshospitalet. The information from the questionnaire is routinely transferred to the pregnant women s medical records. 