IFNE and infection: Ifne-/- mice have 42.7% fewer conventional (c)NK cells (CD45+CD3-NK1.1+) in uterine tissues compared to WT mice during infection at 3dpi (mean total number of NK cells: IFNε-/- mice [9.46 × 103], WT controls [1.65 × 104]; Fig. 1A).