Fluorescence intensity (means ± SE, n = 7) for upregulated lipid regulator genes between 6 h and 42 days of lactation. P values represent repeated-measures analysis after H-B multiple testing corrections. mRNA of thyroid hormone-responsive protein (THRSP), sterol-regulatory element binding transcription factor 1 (SREBF1), insulin-induced genes 2 (INSIG2), estrogen receptor 1 (ESR1), estrogen receptor related-α (ESRRA), and peroxisome proliferator-activated receptorα (PPARA) all increased (≥2.0-fold, P < 0.01) by day 4. However, - mRNA of PPAR-γ, (PPARG), SREBF chaperone (SCAP) and SREBF2 decreased (P < 0.01) by day 4.