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ERα and ERβ protein abundance in fetal hearts. Hearts were isolated from 21-day fetuses from pregnant rats treated with hypoxia from day 15 to day 21 of gestation. ERα and ERβ protein abundance in fetal hearts were determined by Western blot using specific antibodies. Data are presented as means ± SE; n = 5, analyzed by two-way ANOVA. *P < 0.05, female vs. male.
