6X milking: No impact on reproduction

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Frequent-milking in early lactation doesn’t always increase milk production. (Please see “What’s new with 4X/6X milking?” on page 32 of the January issue.) It also may not affect reproduction.

A University of Arizona study published in the November 2005 Journal of Dairy Science shows no difference in reproductive performance between cows milked 6X for 21 days and their 3X herdmates. The table below shows some of the study’s findings:

Parameter

3X cows

6X cows

Percent pregnant within 65 days of voluntary waiting period

37

32

Days in milk at
pregnancy

125

127

Number of breedings

2.33

2.31

Source: November 2005 Journal of Dairy Science



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