Fig. 1From: Peripheral thyroid hormone levels and hepatic thyroid hormone deiodinase gene expression in dairy heifers on the day of ovulation and during the early peri-implantation periodAge adjusted A thyroid-stimulating-hormone (∆TSH), B thyroxine (∆T4) and C triiodothyronine (∆T3) blood concentrations (mean ± SEM) of pregnant (p) heifers and respective non-pregnant (np) and negative control cycles (NC); the significant differences between the groups on certain days are marked with different letters. The results of the mixed–model are shown in the table below each graphBack to article page