Meta-analysis of lamb birth weight as influenced by pregnancy nutrition of multiparous ewes.

ABSTRACT: Across the literature, there is large variation in lamb birth weight responses to changes in the ewe pregnancy nutrition. Much of this heterogeneity has been attributed to several factors inherent to each experiment; however, the relative contribution of these experimental factors has not yet been quantified. This meta-analysis aimed to systematically review the variation in lamb birth weight responses across nutritional studies involving adult multiparous ewes. Effect-sizes for individual studies were estimated using the unbiased estimator Hedges' g, whereby positive and negative values indicate heavier and lighter treatment lambs vs. controls, respectively. Heterogeneity varied between early-, mid- and late-pregnancy undernutrition studies (I2total [early pregnancy] = 19.90%, I2total [mi

SUBMITTER: Roca Fraga FJ 

PROVIDER: S-EPMC6140851 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature