Paternal and Fetal Genotyping in the Management of Alloimmunization in Pregnancy

This Clinical Practice Update clarifies guidance on paternal genotyping and provides new recommendations on the role of noninvasive fetal red blood cell antigen genotyping using cell-free DNA (cfDNA). This document updates Practice Bulletin No. 192, Management of Alloimmunization in Pregnancy (Obstet Gynecol 2018;131:e82–90).