title: Anomalous ABO inheritance explained by ovum transplantation.
abstract: BACKGROUND
  Modern fertilization techniques can lead to unexpected ABO phenotypes in newborn infants and can raise questions as to maternity, paternity, and infant misidentification. Ovum transplantation can result in an infant with an ABO phenotype that is unexpected, given the birth mother's ABO type.
  
  
  METHODS
  A group AB, Rh-positive female infant was born to a group O, Rh-positive woman as a result of ovum transplantation. The case report is provided.
  
  
  RESULTS
  The birth mother typed group O, Rh-positive both before and after delivery. The infant typed group AB, Rh-positive on cord blood and heelstick specimens.
  
  
  CONCLUSIONS
  Ovum transplantation can result in newborns whose ABO phenotypes are unexpected, in relation to the birth mother's ABO type. To ensure patient privacy, such fertilization techniques may not be clearly documented in the delivery room chart. A complete obstetric history helps prevent repeat phlebotomies, expensive and unnecessary typing studies, and concern of the clinical staff with possible sample or infant misidentification.
authors.affiliation: Department of Pathology and Laboratory Medicine, University of Rochester School of Medicine and Dentistry, New York.
authors.forename: G G
authors.initials: GG
authors.lastname: Freund
authors.forename: C
authors.initials: C
authors.lastname: Finke
authors.forename: S A
authors.initials: SA
authors.lastname: Kirkley
mesh_terms: D000017:ABO Blood-Group System; D001788:Blood Grouping and Crossmatching; D003298:Coombs Test; D005260:Female; D005312:Fetal Blood; D006801:Humans; D007074:Immunoglobulin G / Q000097:blood; D007231:Infant, Newborn; D007317:Insemination, Artificial, Homologous; D008875:Middle Aged; D010063:Ovum / Q000637:transplantation*; D012204:Rh-Hr Blood-Group System
chemical_list: D000017:ABO Blood-Group System; D007074:Immunoglobulin G; D012204:Rh-Hr Blood-Group System