Jens Christian Prien-Larsen1, Ram B Dessau2. 1. Department of Obstetrics and Gynecology, Nykøbing Falster Hospital, Fjordvej 15, 4800, Nykøbing Falster, Denmark. jcpr@regionsjaelland.dk. 2. Department of Clinical Microbiology, Slagelse Hospital, 4200, Slagelse, Denmark.