Ultrasonographic features of fetal growth in sows fed activated insulin like-growth factor i-supplemented feed

Issue Date

2020

Abstract

Insulin-like growth factor I (IGF-I) is a 70 amino acid long polypeptide hormone involved in metabolic regulation of growth and reproduction in livestock. The present study was conducted to determine the effects of dietary supplementation of activated IGF-I on porcine fetal growth using real-time B-mode ultrasonography. Thirty-seven crossbred pigs were randomly assigned to different treatments composed of basal gestation diets with 0, 0.25, 0.5, and 1 kg/ton activated IGF-I. Feeding trial started from Day 1 post-breeding until farrowing. Dietary supplementation of 1 kg/ton activated IGF-I significantly increased the gestational sac diameter at Day 21, biparietal head diameter at Day 75, and abdominal circumference at Day 100. Sows supplemented with activated IGF-I regardless of inclusion rate had fetuses with high abdominal circumference at Day 75 compared with the control. At birth, average litter weight had an increasing trend with increasing IGF-I concentration. The results obtained in this study demonstrated the potential of activated IGF-I supplementation in increasing fetal growth and consequently, swine production performance.

Source or Periodical Title

Philippine Journal of Veterinary Medicine

ISSN

0031-7705

Volume

57

Issue

1

Page

87-96

Document Type

Article

Language

English

Subject

Swine; Swine feeds and feeding

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