Karen Ruben Husby1,2, Gunnar Lose3,4, Niels Klarskov3,4. 1. Department of Obstetrics and Gynecology, Herlev and Gentofte University Hospital, Borgmester Ib Juuls Vej 1, 2730, Herlev, Denmark. Karen.ruben.husby.02@regionh.dk. 2. University of Copenhagen, Copenhagen, Denmark. Karen.ruben.husby.02@regionh.dk. 3. Department of Obstetrics and Gynecology, Herlev and Gentofte University Hospital, Borgmester Ib Juuls Vej 1, 2730, Herlev, Denmark. 4. University of Copenhagen, Copenhagen, Denmark.