This study explored the possibility of sex-specific effects on embryonic survival in primiparous sows subjected to restricted feed intake during the last week of lactation and bred after weaning (Restrict; n = 16), compared with control sows fed close to ad libitum feed intakes (Control; n = 17). Restrict sows were in a substantial negative net energy balance at weaning, and lost 13% of estimat...

OBJECTIVES The goal of this article was to evaluate the association between flaxseed intake during lactation and its effects on the reproductive indexes in female offspring at infancy, puberty and adult age. MATERIAL AND METHODS Two groups were evaluated, an experimental group (FG, n=24) which consumed a flaxseed based diet and a control group (CG, n=26) which had access to a casein based die...

Weekly total body energy content (TBEC) was calculated for 444 Holstein cows in their first 3 lactations. These calculations were based on body lipid and protein changes predicted from weekly changes in body condition score and live weight of each cow. In first lactation, cows lost TBEC during the initial 8 wk, regained it by wk 22, and continued to build up their reserves until wk 37. Cows sta...

Over 119,000 Jersey cows (daughters of 374 bulls) that first calved in 1979 through 1987 were used to evaluate management and genetic effects on suwival in Jersey cows. Survival traits included survival through first lactation, survival to 20 mo after fist calving, and length of productive life (maximum 60 mo). Higher production in first lactation and lower age at first calving were associated ...

Although common in birds, social monogamy, or pair-living, is rare among mammals because internal gestation and lactation in mammals makes it advantageous for males to seek additional mating opportunities. A number of hypotheses have been proposed to explain the evolution of social monogamy among mammals: as a male mate-guarding strategy, because of the benefits of biparental care, or as a defe...

Background & Aims: Development during childhood is vital for learning skills. Maternal omega-3fatty acids during pregnancy and lactation play important role in childhood development. The aim of this study is to determine omega-3 supplementation during lactation on the growth and development of infants. Materials & Methods: This is a double-blind randomized trial. A total of 70 lactating...

description of lactation curve were investigated using sine function, compare it with two functions (dijekstra and wood). the data contained 32233 dairy milk yield records from 93 first parity iranian holstein cows that had calving between aug. 2008 and jul. 2009. actual milk production per day and subsequently the actual production of each animal were available in the first lactation. lactatio...

The objective of this presentation will be to relate field experiences regarding the impact of gilt age and lactation length on sow productivity. Over time the largest percentage of females to farrow within a herd are parity one and therefore overall herd productivity is greatly influenced by the results achieved by them. Gilt age and weight at first service have a direct impact on these result...

BACKGROUND Infants are very sensitive to iodine deficiency. Breastfed infants are dependent on maternal iodine intake. The aim of this study was to evaluate the relationship between maternal iodine status during lactation and infant weight and length. METHODS A cross-sectional survey was conducted to investigate maternal iodine status and infant anthropometric measures in Henan Province, Chin...