Embryonic resorption rate in mice pre-treated with progesterone.

Different letters (in brackets) denote significant differences (PGroups of mice were injected with LPS (1, 0.5 and 0.3 µg/g) and LPS+progesterone (2 mg/mouse, 2 h before LPS injection) on day 7 of gestation. Embryo resorption rates were determined on day 12 of gestation and are expressed as percentages (number of dead embryos/(number of dead embryos+number of healthy embryos) X 100). Different letters (in brackets) denote significant differences (P