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Table 3 Means ± SEM. of estradiol serum concentration (pg/ml) in control and animals injected with atropine sulfate (ATR) at 12:00 h on Diestrus 1, Diestrus 2 or Proestrus. The animals were sacrificed at 14:00 h.

From: The role of the muscarinic system in regulating estradiol secretion varies during the estrous cycle: the hemiovariectomized rat model

Group N Diestrus 1 N Diestrus 2 N Proestrus
Control 17 55.3 ± 8.0 20 61.7 ± 4.9 12 158.4 ± 10.8
ATR 8 9.0 ± 1.8* 8 67.5 ± 2.7 7 51.7 ± 9.8*
  1. * p < 0.05 vs. non-ATR treated group (Student's t test)