BACKGROUND This study was carried out to determine if an association exists between the shape of the lactation curve before it is influenced by the event of conception and the time from calving to conception in Norwegian dairy cattle. Lactation curves of Norwegian Red cows during 5 to 42 days in milk (DIM) were compared between cows conceiving between 43 and 93 DIM and cows conceiving after 93 ...

The objective of the present study was to compare the ability of chlorhexidine and povidone-iodine to cause cessation of lactation in Staphylococcus aureus-infected mammary quarters, assess milk production in the treated quarter in the subsequent lactation, and evaluate whether microbiological cure was obtained. Fourteen mid- to late-lactation Holstein-Friesian dairy cattle from the Washington ...

The present study was undertaken to investigate the changes in muscle protein turnover involved in the rapid mobilization of protein in rats subjected to severe protein restriction during lactation. Estimates of mammary gland and liver protein synthesis were also made during lactation. Multiparous female Sprague-Dawley rats, caged individually following mating, were offered a high-protein diet ...

Twenty-four lactating and 13 nonlactating Alpine goats were used to determine effects of stage of lactation and dietary concentrate level on energy utilization. Diets comprising 60 or 20% concentrate (60%C and 20%C, respectively) were consumed ad libitum by lactating animals and at a level of intake near maintenance by nonlactating animals. Measurement periods were d 25 to 31 (early), 87 to 94 ...

The Ural type of the domestic Black-and-White mottled breed is characterized high milk-yield rates and good suitability for industrial milking technology. milk yield increase led to a deterioration reproductive functions in livestock. As result research it was found that process prolonged using cattle, cows regularly changes, reaching highest among mature by 3rd lactation, then gradually decrea...

Results: Higher average daily lactation feed intake, greater litter weight, and greater backfat thickness at weaning were associated with less likelihood of removal of sows from the herd before the subsequent parity. Sows consuming ≤ 3.5 kg of feed per day during the fi rst 2 weeks of lactation were more likely to be removed from the herd before the next parity. Implications: Measures to ensure...

Background: It was hypothesized that under apparently good management practices in dairy farms, some cows may not be metabolically perfect during the breeding period and this may affect their performance. Aims: This study was conducted to assess probable metabolic drawbacks in mid-lactation dairy cows affecting their performance. Methods: Thirt...

The regulation of mitochondrial biogenesis and function in the lactating mammary cell is poorly understood. The goal of this study was to use proteomics to relate temporal changes in mammary cell mitochondrial function during lactation to changes in the proteins that make up this organelle. The hypothesis tested was that changes in mammary cell mitochondrial biogenesis and function during lacta...

OBJECTIVE To review the toxicity issues of commonly used antirheumatic drugs in pregnancy and lactation. METHODS A review of the medical literature using Medline database via Ovid was performed to identify the toxicities of antirheumatic drugs in pregnancy and lactation. RESULTS Many rheumatologic diseases in women often first present during the childbearing years. In most cases, antirheuma...