Fig. 2
From: The regulation of ovary and conceptus on the uterine natural killer cells during early pregnancy
KIR-A/homologous C2 and KIR-B/homologous C1 are two high-risk combination. a All possible combination of maternal KIR haplotypes with trophoblastic HLA-C ligands. Combinations with intensive inhibition are failure to activate uNK cells to secrete relevant angiogenic cytokines and more vulnerable to undergo pregnancy losses. Thus, KIR-A/homologous C2 and KIR-B/homologous C1 are two high-risk combinations than other combinations. b Binding properties of the main KIRs for fetal HLA-C