4. Discussion
No difference in maternal insulin sensitivity at mid-
pregnancy was found between large Suffolk breed ewes
carrying transferred small Cheviot breed lambs or the
reverse embryo transfer, or in comparison with withinbreed
transfers. This is despite constrained birth size of
Suffolk lambs born to Cheviot ewes and a tendency for
Cheviot lambs to be larger when born from the less con-
strained Suffolk uterine environment. Although fasting