The high level of productivity brought about by market supply of hybrid animals, high performance early. These are more demanding, because the features express a high productive and reproductive performance, need a nutrient intake that inter-relates well with the different stages of development, giving an adequate body condition and metabolic. The interrelationship of nutrition and breeding sows, few studies refer to the use of synthetic amino acids in the diets of post-pubertal gilts and primiparous, on pregnancy and lactation stages. Glutamine (Gln) is a nonessential amino acid, but in situations of intense stress and catabolism becomes "essential", since actively participates in protein metabolism. The purpose of this study is to evaluate the use of glutamine in the diet of gilts in the post-pubescent, extending to subsequent pregnancy and lactation, as these are critical phases in the lifetime reproductive need, therefore, specific nutritional requirements. Production parameters will be assessed in females by means of the variables, weight and backfat thickness in the first and third estrous cycles in the latter third of gestation and lactation. The reproductive extend the litter size and interval weaning to estrus including evaluating the weight of piglets at birth, 7, 14 and 21 days old piglets with the corresponding weight gain. The effect of glutamine will also be measured by assessing the viability of embryonic (day 5 of pregnancy), ovulation rate, embryonic mortality and fetal (70th day of gestation), as well as the analysis of the ovary, placenta and uterine morphology. The investigation of the hormonal and metabolic status will be measured by blood parameters, and glutamine levels in plasma, in addition to evaluations of levels of the amino acid present in milk.
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