Connective tissue growth factor (CCN2; CTGF) and transforming growth factor β type 1 (TGF-β1) localisation in the pig uterine tract during the oestrous cycle. Uteri from cycling gilts on days 0 (A–D), 5 (E,F), 10 (I–L), 15 (M–P), and 18 (Q–T) were analysed for CCN2 (CTGF) protein (A,E,I,M,Q), CCN2 (CTGF) mRNA (B,F,J,N,R), TGF-β1 protein (C,G,K,O,S), or TGF-β1 mRNA (D,H,L,P,T). e, luminal epithelium; g, glandular epithelium; s, stroma; v, blood vessel.