Glutamine and vitamin A supplementation during critical periods of gestation reduces weight variability in piglets at birth
DOI:
https://doi.org/10.1590/1809-6891v25e-76945EAbstract
Selection and genetic progress have led to the modification of the female profile, and
prolificacy has become the main trait. Consequently, fetal development was affected by the increased
number of piglets, resulting in higher uterine competition for nutrients and space. This study aimed
to analyze the effects of glutamine and vitamin A supplementation on embryonic and fetal survival
and their influence on the reproductive and productive performance of females. We selected 71
females from Large White X Landrace X Meishan X Jianjing crosses from different orders of parturition
for uniform distribution between treatments, divided into two groups. Glutamine and vitamin A
supplementation during periods considered critical for gestation was effective in terms of placental
color, resulting in darker placentas, which could mean higher vascularization. The inclusion of glutamine
and vitamin A influenced less variability in stillborn per litter and intra-litter birth weight of liveborn
piglets. The treatment did not influence the mean birth weight of piglets but supplementation reduced
the percentage of light piglets (≤ 1000 g) in high and low prolificacy females.
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