Funding for this research was provided by:
Sveriges Kommuner och Landsting
KK Fonden - Deparment of Gynecology and Obstetrics - Sundsvall - Sweden
Received: 23 March 2020
Accepted: 26 August 2020
First Online: 14 September 2020
Ethics approval and consent to participate
: This study was approved by the Regional Ethical Review Board of Uppsala, Sweden (Dnr: 2014/188). Permission to access the medical records in Obstetrix were granted by the head of the department of women’s health in Västernorrland County. All women have received both verbal and written information about the study and signed an informed consent form.
: Not applicable.
: They authors declared that they have no competing interests.