Follicle diameters up to 11 days before ovulation (mm) | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Days before ovulation | −11 | −10 | −9 | −8 | −7 | −6 | −5 | −4 | −3 | −2 | −1 | 0 |
First ovulations of the season | ||||||||||||
Jan 14th to Feb 22nd | ||||||||||||
No. of observations | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
Mean diameter | 20 | 23.5 | 26 | 27.7 | 30.1 | 33.1 | 34.3 | 36.2 | 39.1 | 41.7 | 43.5 | 44.6 |
Feb 25th to May 22nd | ||||||||||||
No. of observations | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
Mean diameter (mm) | 20.3 | 22.3 | 25 | 27.5 | 30.1 | 33.3 | 35 | 38 | 40.2 | 42.1 | 42.7 | 44.8 |
Jan 14th to May 22nd | ||||||||||||
Total no. of observations | 31 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 |
Mean diameter (mm) | 20.1 | 22.9 | 25.5 | 27.6 | 30.1 | 33.2 | 34.6 | 37.1 | 39.6 | 41.9 | 43.1 | 44.7 |
Range (mm) | <10-36 | <10-37 | 10-41 | 10-43 | 10-44 | 12-45 | 15-48 | 18-48 | 20-53 | 25-55 | 31-57 | 35-59 |
Subsequent ovulations | ||||||||||||
Jan 15th to Mar 12th | ||||||||||||
No of observations | 2 | 4 | 3 | 4 | 9 | 5 | 11 | 11 | 14 | 15 | 14 | 17 |
Mean diameter (mm) | 19 | 24.8 | 20.3 | 25.8 | 28.2 | 32.6 | 34.7 | 36.6 | 39.3 | 41.9 | 44.8 | 44.2 |
Mar 14th to June 16th | ||||||||||||
No. of observation | 3 | 3 | 3 | 5 | 5 | 8 | 7 | 11 | 13 | 14 | 17 | 17 |
Mean diameter (mm) | 26 | 23.6 | 29.2 | 28.2 | 31.4 | 30.4 | 33.7 | 36.5 | 39 | 41.5 | 41.6 | 42.8 |
Jan 15th to June 16th | ||||||||||||
No. of observations | 5 | 7 | 6 | 9 | 14 | 13 | 18 | 22 | 27 | 29 | 31 | 34 |
Mean diameter (mm) | 23.2 | 24.3 | 24.8 | 27.1 | 29.3 | 31.3 | 34.3 | 36.5 | 39.1 | 41.7 | 43 | 43.5 |
Range (mm) | 14 - 32 | 17 - 34 | 18 -36 | 16 -37 | 15 -41 | 23- 39 | 24 - 43 | 24.5-47 | 26 - 52 | 27.5-52 | 31.5-55 | 31-57.5 |
Difference in mean diameters | −3.1 | −1.4 | 0.7 | 0.5 | 0.8 | 1.9 | 0.3 | 0.6 | 0.5 | 0.2 | 0.1 | 1.2 |
Mean growth rate (mm/day) | Day −11 to 0 | Day −8 to 0 | Day −5 to 0 | |||||||||
First ovulations | 2.20 | 2.14 | 2.02 | |||||||||
Subsequent ovulations | 2.19 | 2.37 | 1.84 | |||||||||
Difference | 0.01 | 0.23 | 0.18 |