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The E2 concentrations in the rat blood serum 6 weeks after ovariectomy or nonovariectomy. SMF: ovariectomized and implanted with a disc magnet; Sham: ovariectomized and implanted with a nonmagnetized disc; OVX: ovariectomized alone; CTL: intact (nonoperated) cage control. n = 10 in each group. *P < .05 versus CTL. no. of rats under the detection limit (<5 pg/mL): SMF, n = 7; Sham, n = 7; OVX, n = 3; CTL, n = 2. These E2 levels were shown as “0” at the E2 concentration.
