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Table 1 Follicular characteristics and hormonal concentrations during 2-wave and 3-wave interovulatory intervals

From: Ovarian follicular activity and hormonal profile during estrous cycle in cows: the development of 2 versus 3 waves

 

No. of follicular waves during an interovulatory interval

 

2-wave

3-wave

Interovulatory Intervals

  

No.

4

10

Length (days)

19.8 ± 0.6*

22.5 ± 0.8*

Length of days between emergence of waves:

  

1st wave to 2nd

8.7 ± 0.3 a

7.2 ± 0.7 a

2nd wave to 3rd

10.8 ± 0.3 b

7.7 ± 0.4 a

3rd wave to ovulation

 

9.5 ± 0.4 b

Anovulatory follicles

  

Maximum diameter (mm)

6.8 ± 0.3*

7.3 ± 0.7*

Ovulatory follicles

  

Maximum diameter (mm)

10.9 ± 0.3

11.0 ± 0.9

Estradiol concentration (pg/ml)

5.40 ± 0.26

4.94 ± 0.15

Progesterone concentration (ng/ml)

0.96 ± 0.07*

1.43 ± 0.11*

  1. Values are means ± SEM. Means with (*) in the same row are significantly different (P < 0.05)(LSD). Means with different letters (a,b) in the same column are significantly different (P < 0.05)(LSD).
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Reproductive Biology and Endocrinology

ISSN: 1477-7827

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