Recent studies published after the present investigation was under way have shown that dexamethasone suppresses fetal adrenal gland function and fetal growth in pregnant Rhesus monkeys at pharmacologic doses (40 to 160 ÎĽg/kg/day). Doses higher than 160 ÎĽg/kg/day caused fetal death.37,38 Transplacental passage of dexamethasone has also been documented previously in rats39 and in women receiving high doses of dexamethasone in the last trimester of pregnancy for prevention of respiratory distress syndrome.40
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