Detection of alloanti-D in the pregnant women with true D^– and Asian-type DEL phenotypes. (A) Flow diagram of enrollment of the pregnant women with serologic D^– phenotype. (B) The numbers and percentages of pregnant women, according to the gestational time (G1 to ≥G5), were identified with alloanti-D in the true D^– and Asian-type DEL groups. (C) The RHD genotypes of 127 patients who developed alloanti-D. The percentages of RHD gene variants, including deletion and 2 nonfunctional alleles accounting for the true D^– phenotype rather than Asian-type DEL, were shown. The gestations with D⁺ fetus were not prospectively confirmed because >95% of Chinese women with true D^– or women with Asian-type DEL carry a D⁺ fetus.