Table 2 Individual mare variation in follicle growth rates and ultimate preovulatory diameter

First ovulations

2nd/3rd ovulations

First half

First half

1

50

3.64

3.75

1

53.5

2.95

2.56

2

50

2.95

3.38

2

51.5

3.41

2.23

3

48

2.64

1.63

3

49

2

1.5

4

47

1.95

1.5

4

48

3

2.45

5

46.5

2.23

2.06

5

47.5

No data

3.19

6

46

1.73

1.31

6

47

No data

2

7

46

1.77

1.81

7

47

No data

3.88

8

46

2.36

2.06

8

47

No data

3.38

9

45

2.05

2.19

9

45.5

No data

3.19

10

45

1.73

1.31

10

45

1.91

2.79

11

43

2.18

2.5

11

45

No data

1.93

12

43

2.09

2.13

12

44

No data

1.19

13

42

1.82

2.75

13

43

1.82

1.14

14

41

1.82

1.88

14

36

1.91

3

15

38.5

2.41

2.31

15

35

2.09

1.89

16

36.5

1.29

1.31

16

34

No data

1.86

17

33

No data

1.57

Mean

2.17

2.12

2.39

2.34

Second half

1

59

3.55

3

1

57.5

No data

3.87

2

54.5

3.05

3.06

2

51

2.09

2.3

3

50

1.18

0.88

3

46.5

No data

3.58

4

48.5

2.32

2.06

4

46.5

No data

3.25

5

48

2.56

2.75

5

46

No data

3.08

6

48

2.36

2.13

6

45.5

No data

2.58

7

46.5

2.09

1.94

7

44.5

No data

1.56

8

45

1.36

1.19

8

44

No data

1.36

9

43

1.68

1.75

9

43.5

2.32

3.25

10

42.5

2.5

2.13

10

43

No data

2.29

11

41.5

2.05

2.5

11

41.5

No data

3.5

12

41

2.82

2.63

12

41

No data

1.5

13

39.5

2.05

2.19

13

40.5

No data

2.92

14

39

2.09

1.75

14

38

2.36

0.88

15

36

2.36

3.25

15

35.5

No data

2.5

16

35

1.64

1.38

16

32.5

1.25

1.19

17

31

1.4

1.38

Mean

2.23

2.16

1.88

2.41

Both halves

Mean

2.2

2.14

2.19

2.37