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Maternal peripheral serum estradiol concentrations in baboons untreated (n = 8) or treated subcutaneously with letrozole (115 μg/kg body wt; n = 13) or letrozole plus estradiol benzoate (each at 115 μg/kg body wt; n = 5) daily between days 100 and cesarean section on days 163–173 of gestation. Values represent the means for 5-day intervals between days 100 and 160 of gestation (term = 184 days).
