The effect of temporary once-daily milking, starting right after calving, on milk production and nutritional status of 50 Holstein cows (15 primiparous) was studied. Primiparous cows were divided into two groups: a control group (Pc) continuously milked twice daily and an experimental group (P3) milked once a day for the first three weeks of lactation and then twice daily. Multiparous cows were divided into three groups: a control group (Mc) continuously milked twice daily, an experimental group milked once a day for the first three weeks of lactation and then twice daily (group M3), and another experimental group milked once a day for the first six weeks after calving and then twice daily (group M6). The trial ended when the cows were turned out to pasture. Cows milked once daily did not seem to suffer from discomfort. Once-daily milking decreased the milk yield
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Rémond et al. (1999) studied this question.