Effect of serum IGF-I on progesterone concentration during early pregnancy in Korean native cattle (Hanwoo)

Yang Hwan Ryu, Jong Yong Yang, Dong S. Seo, Yong Ko

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Insulin-like growth factor-I (IGF-I) is a polypeptide that has the function of regulating the expression of steroid hormones through endocrine, paracrine, and autocrine actions in reproductive organs. Moreover, IGF-I is involved in ovulation, implantation, maintenance of pregnancy, and development of fetuses in animals. Therefore, this study was conducted to investigate the effects of serum IGF-I concentration on progesterone (P4) concentration and pregnancy rates in Korean native cattle (Hanwoo). Blood was collected at estrus (Day 0) and Day 11. Artificial insemination was performed at Day 0. Serum IGF-I and P4 concentrations were measured by radioimmunoassay (RIA). Overall, P4 concentration was higher at Day 11 than Day 0, whereas the pattern of IGF-I concentration was reversed. When animals were divided into two groups depending on the pregnancy status, P4 concentrations of the pregnant group was significantly higher than that of the non-pregnant group at Day 0 (p<0.05) and Day 11 (p<0.05). But, lower IGF-I concentrations were detected in the pregnant group at Day 0 (p<0.05) and Day 11 (p<0.05) compared to the non-pregnant group. In conclusion, these results indicated that serum IGF-I is inversely associated with P4 concentration during early pregnancy in Hanwoo.

Original languageEnglish
Pages (from-to)176-179
Number of pages4
JournalAsian-Australasian Journal of Animal Sciences
Volume16
Issue number2
Publication statusPublished - 2003 Feb 1

Fingerprint

insulin-like growth factor I
blood serum
Insulin-Like Growth Factor I
Progesterone
progesterone
pregnancy
Pregnancy
cattle
Serum
Pregnancy Maintenance
Artificial Insemination
Estrus
steroid hormones
Pregnancy Rate
Ovulation
radioimmunoassays
pregnancy rate
artificial insemination
Radioimmunoassay
fetus

Keywords

  • Early Pregnancy
  • IGF-I
  • Korean Native Cattle
  • Progesterone

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Effect of serum IGF-I on progesterone concentration during early pregnancy in Korean native cattle (Hanwoo). / Ryu, Yang Hwan; Yang, Jong Yong; Seo, Dong S.; Ko, Yong.

In: Asian-Australasian Journal of Animal Sciences, Vol. 16, No. 2, 01.02.2003, p. 176-179.

Research output: Contribution to journalArticle

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