Fig. 4.

Cellular silver-grain analysis after α1 subunit mRNA hybridization in the dorsal (SON oxytocin region) and ventral (SONvasopressin region) parts of the supraoptic nucleus and in the anteroventromedial (PVN oxytocinregion) and posterodorsolateral (PVN vasopressinregion) parts of the posterior paraventricular nucleus in pregnant day 10 (P10) and 19 (P19) and parturient (PA) rats (n = 5). Bars represent mean number of silver grains per cell ± SEM. *p < 0.05; **p < 0.01.