September 10, 2025Scientific HorizonsOpen Access

Analysis of lactation length variability and its relationship to cow milk production

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Analysis reveals associations between lactation length, milk yield, and cow age in dairy cattle.

Longer lactation lengths correlate with higher daily milk yield estimates, especially in months 8-10.
Lactation length ranged from 173 to 1,150 days, with age significantly affecting the length (P < 0.001).
Analysis included data from 604 lactations and identified a significant bull sire effect on lactation length (P = 0.005).
Season and year of calving also influenced lactation length variability among dairy cows.

Kramarenko et al. (2025) studied this question.

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