Endocrine and Autocrine Strategies for the Control of Lactation in Women and Sows

Hartmann, Peter; Atwood, Craig S.; Cox, David B.; Daly, Sheridan

doi:10.1007/978-1-4615-1973-7_44

Cited by 12 publications

(9 citation statements)

References 101 publications

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“…Our data indicate that litter size is an important factor affecting milk production, and this is consistent with Auldist and King's (1995) review of the pigs' role in determining milk production. The close relationship between litter size and milk output across the range in sow body composition and CP content of the lactation diets used in the present study suggests the existence of a strong autocrine mechanism (Hartmann et al, 1995) for regulating milk synthesis in sows. Hence, it becomes particularly important to ensure that sows have adequate lean reserves at the start of lactation and are fed a lactation diet sufficiently high in CP when litter size is high (e.g., > 10), as frequently occurs with modern genotypes.…”

Section: Discussionmentioning

confidence: 51%

Body composition at farrowing and nutrition during lactation affect the performance of primiparous sows: II. Milk composition, milk yield, and pig growth.

Revell

Williams

Mullan

et al. 1998

Journal of Animal Science

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Sows that were either fat or lean at farrowing (340 or 280 g of body fat/kg BW, respectively) were offered either a low-protein (LP; 7.9% CP and 15.5 MJ DE/kg as fed) or a high-protein (HP; 19.0% CP and 15.6 MJ DE/kg as fed) diet on an ad libitum basis throughout a 4-wk lactation to test the hypothesis that the amount of milk and its composition are responsive to the supply of endogenous (body reserves) and exogenous (diet) substrates. Pigs were weighed at birth and weekly during lactation, milk yield was estimated using deuterium oxide in early (d 4 to 8) and late lactation (d 24 to 28), and milk samples were collected to determine composition in early (d 4 to 6) and late lactation (d 25 to 27). Throughout lactation, milk yield and composition were mainly associated with differences in litter size. Milk yield was about 15% higher in lean than in fat sows and in sows fed HP rather than LP, but large CV (17 to 32%) prevented these differences from attaining significance (P > .273). The responses in milk yield were reflected in pig growth. Differences in milk composition between treatment groups were not significant; however, during early lactation there was a tendency for fat sows to produce milk with a fat content 21% higher, and a protein content 12% lower, than that of lean sows. Changes in the protein:energy ratio of milk during the course of lactation and small changes in milk yield composition collectively suggested that in early lactation, sow body composition affected milk production but, as lactation progressed, the dietary supply of precursors for milk synthesis became more important.

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Section: Discussionmentioning

confidence: 51%

Body composition at farrowing and nutrition during lactation affect the performance of primiparous sows: II. Milk composition, milk yield, and pig growth.

Revell

Williams

Mullan

et al. 1998

Journal of Animal Science

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“…[19, 20] In the first months of life, formula fed infants are also capable of self-regulating milk intake. Under experimental conditions, 3-day old infants responded negatively to the odor of their formula within several hours of a feeding, but not if more time had lapsed.…”

Section: Energy Regulationmentioning

confidence: 99%

Development of Eating Behavior

Gahagan

2012

Journal of Developmental &Amp; Behavioral Pediatrics

127

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“…Indeed, it has become clear that milk output is regulated to match the infant's demand, and is signalled to the breast by the frequency and completeness of milk removal (for review, see Hartmann et al 1994).…”

Section: J Wilde and O T H E R Smentioning

confidence: 99%