Non Immune Hydrops Fetalis is caused by:

Non immune hydrops can be caused by a variety of causes. Among the infectious cause, parvovirus can lead to non immune hydrops. Hydrops fetalis refers to excessive accumulation of fluid in at least two fetal body cavities. It can be of two types, immune and non immune. Immune type result from hemolysis of fetal RBC by maternal IgG antibodies to fetal antigen. Non immune type, is the result of any non antibody mediated process that lead to hydrops. Ref: Fetal Medicine : Basic Science and Clinical Practice, 2nd Edition, Page 522; Ian Donald's Practical Obstetric Problems, 6th Edition, Page 218; William's Obstetrics, 23rd Edition, Page 627; Moffet's Pediatric Infectious Diseases : A Problem Oriented Approach, 4th Edition, Pages 377, 643.