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Relationships between foetal fluid insulin-like growth factor-one levels and foetal growth following reciprocal embryo transfer between meishan and landrace x large white gilts

Published online by Cambridge University Press:  20 November 2017

C. J. Ashworth  and
T. Atkinson
C. J. Ashworth
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen, AB2 9SB
T. Atkinson
Affiliation:
Rowett Research Institute, Greenburn Road, Bucksburn, Aberdeen, AB2 9SB
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Extract

There is increasing evidence that foetal growth rate and birthweight have a major influence on subsequent offspring viability. Using reciprocal transfer of day 4 or 5 embryos between Meishan (MS) and Landrace x Large White (LxLW) gilts we have previously demonstrated that, regardless of the breed of the donor gilt, foetuses carried by MS mothers were significantly lighter, shorter and contained within smaller allantoic sacs on Day 30 after oestrus than foetuses carried by LxLW mothers (Ashworth et al., 1990). These results suggested that Meishan mothers may be able to limit foetal growth, although the mechanisms involved were unknown. In the present study, amniotic and allantoic fluids collected from these embryo transfer recipients were analysed to determine levels of insulin-like growth factor-one (IGF-1), which has been shown to be an endocrine regulator of foetal growth (Harding et al., 1994).

Type
Posters for Theatre Session
Information
Proceedings of the British Society of Animal Science , Volume 1995 , March 1995 , pp. 184
Copyright
Copyright © The British Society of Animal Science 1995

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References

Ashworth, C.J., Haley, C.S, Aitken, R.P. and Wilmut, I. (1990) Embryo survival and conceptus growth following reciprocal embryo transfer between chinese meishan and landrace x large white gilts. J. Reprod. Fertil. 90: 595–603.10.1530/jrf.0.0900595CrossRefGoogle Scholar
Harding, J.E., Liu, L., Evans, P.C. and Gluckman, P.D. (1994). Insulin-like growth factor 1 alters feto-placental protein and carbohydrate metabolism in fetal sheep. Endocrinology 134: 1509–1514.10.1210/endo.134.3.8119193CrossRefGoogle ScholarPubMed