RT Book, Section A1 Cunningham, F. Gary A1 Leveno, Kenneth J. A1 Dashe, Jodi S. A1 Hoffman, Barbara L. A1 Spong, Catherine Y. A1 Casey, Brian M. SR Print(0) ID 1190751862 T1 Fetal Disorders T2 Williams Obstetrics, 26e YR 2022 FD 2022 PB McGraw Hill PP New York, NY SN 9781260462739 LK obgyn.mhmedical.com/content.aspx?aid=1190751862 RD 2024/03/29 AB Fetal disorders may be acquired—such as alloimmunization; may be genetic—congenital adrenal hyperplasia; or may be sporadic—like many structural malformations. This chapter reviews fetal anemia and thrombocytopenia and immune and nonimmune fetal hydrops. Hydrops is perhaps the quintessential fetal disorder, as it can be a manifestation of severe illness from a wide variety of etiologies. Fetal structural malformations are reviewed in Chapter 15, genetic abnormalities in Chapters 16 and 17, and conditions amenable to medical or surgical fetal therapy in Chapter 19. Because congenital infections arise as a result of maternal infection or colonization, they are discussed in Chapters 67 and 68.