MYH6 and fetal growth restriction: The proportion of type IIa fibers estimated from MyHC-2a tended to be greater (p = 0.06) for IUGR+CLEN lambs (45.7 ± 1.7%) but not IUGR lambs (40.8 ± 1.2%) compared with controls (41.1 ± 0.8%).