Fig. 4. Cx43-deficient uteri exhibit impaired decidualization. (A-D) Uterine sections from Cx43^fl/fl and Cx43^d/d mice on day 7 (A,B) and day 8 (C,D) of pregnancy were subjected to immunohistochemical staining using an antibody specific for the prolactin-related protein (PRP). (E,F) Uterine sections from Cx43^fl/fl (E) and Cx43^d/d (F) mice on day 8 of pregnancy were subjected to immunohistochemical staining using an antibody specific for the prolactin-like protein (PLP). AM and M denote antimesometrial and mesometrial regions, respectively. Results are from two independent experiments.