title: [A common rarely problematic condition].
authors.affiliation: Institutt for laboratoriemedisin, barneog, kvinnesykdommer, Norges teknisk-naturvitenskapelige universitet. mette.moen@ntnu.no
authors.forename: Mette Haase
authors.initials: MH
authors.lastname: Moen
mesh_terms: D002828:Choristoma / Q000175:diagnosis*; D003656:Decidua; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D010532:Peritoneal Diseases / Q000175:diagnosis*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*