Management of pregnancies with rare blood types

Pregnant women with antibodies to high incidence blood group antigens should be diagnosed as early as possible and red blood cells should be stored frozen for future possible needs. Either autologous, compatible siblings or unrelated individuals' red blood cells should be frozen. The application of such a program is described in three pregnant women with exceedingly rare antibodies to high incidence blood group antigens (anti-Lutheranb, and PP1Pk, and anti c with blood type B CCddee Du negative).