<prompt> Non immune hydrops is seen in?Alpha thalassemia majorRh incompatibilityBilateral renal agenesisMaternal rubella  <response>: Alpha thalassemia major REF: Fetology: diagnosis and management of the fetal patient by Diana W. Bianchi, Timothy Crombleholme, Mary E. DAlton Page 893, Non-Immune causes of Hydrops The non-immune form of hydrops fetalis has many causes including: Iron deficiency anemia Paroxysmal supraventricular tachycardia resulting in Congestive Hea Failure Deficiency of the enzyme beta-glucuronidase Mucopolysaccharidosis Type VII Parvovirus B19 Fifth Disease infection of the pregnant woman. Maternal syphilis. a thalassemia can also cause hydrops fetalis when all four of the genetic loci for - globin are deleted or affected by mutation. This is termed Hb Bas consists of y-4 tetramers. Turner Syndrome Tumors, the most common type of fetal tumor being teratoma, paicularly a sacrococcygeal teratoma. Twin-twin transfusion syndrome in monochorionic pregnancy hydrops affects the recipient twin Maternal hypehyroidism 