Salvianolic acid components had major effects on T lymphocytes and T-cell subsets, such as Th cells and cytotoxic T lymphocytes (CTLs), etc. Wang et al. [111] found that salvianolic acid B (19) reduced the number of NK cell-activating receptor (Nkp46) cells and cytotoxic CD8+ T cells in the placenta of female mice to a greater extent, decreased the expression of inflammatory factors and toll-like receptors in the placenta, and increased the area of the placental labyrinth, which was beneficial for the immunomodulation of the maternal–fetal interface in a mouse model of spontaneous abortion. Here, NCR1 is linked to abortion.