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Table 1 Ovulatory responses of the rats with atropine into the SCN during diestrus-1 or proestrus. The ovulation rates and the means ± SEMs of the numbers of ova shed by the rats subjected to microinjections of the vehicle into the left SCN (Vh L-SCN) or the right SCN (Vh R-SCN) and those subjected to atropine microinjections into the left SCN (ATR L-SCN) or the right SCN (ATR R-SCN) at 09.00 or 19.00 h during diestrus-1 or proestrus

From: Unilaterally blocking the muscarinic receptors in the suprachiasmatic nucleus in proestrus rats prevents pre-ovulatory LH secretion and ovulation

Groups

n

Ovulation rateb

Number of ova shed

n

Ovulation rateb

Number of ova shed

09.00 h of diestrus-1

19.00 h of diestrus-1

 Vh L-SCN

8

8/8

10.4 ± 2.1

10

10/10

10.1 ± 1.2

 ATR L-SCN

10

10/10

11.5 ± 1.2

10

10/10

8.8 ± 1.1

 Vh R-SCN

10

10/10

8.5 ± 1.0

8

7/8

10.0 ± 1.9

 ATR R-SCN

10

9/10

9.5 ± 1.1

8

8/8

8.3 ± 1.3

09.00 h of proestrus

19.00 h of proestrus

 Vh L-SCN

10

10/10

8.5 ± 1.0

8

7/8

10.0 ± 1.9

 ATR L-SCN

14

8/14*

9.8 ± 1.2

8

8/8

11.5 ± 1.4

 Vh R-SCN

10

9/10

11.4 ± 1.6

8

8/8

8.3 ± 1.3

 ATR R-SCN

9

1/9**, ***

3a

8

8/8

11.6 ± 0.8

  1. * p < 0.02 vs. the respective group treated with Vh L-SCN (Fisher’s exact probability test)
  2. ** p < 0.001 vs. the respective group treated with Vh R-SCN (Fisher’s exact probability test)
  3. *** p < 0.04 vs. ATR L-SCN (Fisher’s exact probability test)
  4. arepresents the number of ova shed by the only ovulating rat
  5. bNumber of ovulating animals/number of treated animals