Photomicrographs showing representative immunohistochemistry for CaBP-d9k (A–C) and CaBP-d28k (D–G) in mouse uterus. (A) Nonpregnant. (B and E) Implantation and interimplantation site on d4.5 of pregnancy, respectively. (C, F, and G) D5.5 implantation site. (D) High power image of a d4.5 interimplantation site. (G) A high power view of the boxed area in F.(B Inset) Negative control. le, Luminal epithelium; ge, glandular epithelium; e, embryo. (Scale bars = 25 μm.)