From: Genetic effects and correlations between production and fertility traits and their dependency on the lactation-stage in Holstein Friesians
Interval
DIM
Observations
Mean
Minimum
Maximum
1
11-20
1,085,299
451
25
59,018
2
21-30
1,086,858
26
59,166
3
31-40
1,068,040
444
22
58,688
4
41-50
1,057,773
439
58,529
5
51-60
1,047,639
435
24
58,437