Figure 5.

Representative images of immunohistochemical PR expression in uterine biopsies (200× magnification) from mares susceptible to persistent breeding-induced endometritis pre-breeding (−48 h) and on the day of embryo flushing (eight days post-ovulation, D8). Mares were treated with four intrauterine infusions of Lactated-Ringer’s solution (Control), platelet-rich (PRP), or -poor plasma (PPP). Positive nuclei to PR were brown-stained, while negative nuclei were blue stained by hematoxylin counterstain.