Table 1. Quantitative real-time PCR primers for genes of interest in liver biopsy specimens of pregnant heifers and respective non-pregnant cycles on day 18.

GAPDH, glyceraldehyde-3-phosphate dehydrogenase; RPS9, ribosomal protein S9; GHR1A, growth hormone receptor-1-A; IGF1, insulin-like growth factor-1; IGF2, insulin-like growth factor-2; IGFBP2, IGFBP3, IGFBP4, insulin-like growth factor binding protein-2, -3 and -4, respectively. F, forward; R, reverse.