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The concentrations of ETV in the plasma (a) and the liver (b) at 0.167, 0.5, 1.0, and 3.0 hr after orally dosing with ETV in non‐pregnant (n = 8) and pregnant mice (GD = 18.5, n = 5). (c) The liver‐to‐plasma ETV concentration ratios. n = 5. (d) The plasma concentrations of E2 and P4 in non‐pregnant and pregnant mice (GD = 18.5), n = 6. *P < .05 in comparison with non‐pregnant mice
