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Immunohistochemical localization of relaxin, FoxP3, and RORγ at the maternal-fetal interface of a representative early term placental sample. Relaxin localized in the placental trophoblast at the maternal-fetal interface (arrow) (a). FoxP3 and RORγ co-localized at the maternal-fetal interface (arrows) (b,c). A universal negative control was included to assure no nonspecific binding occurred (d). (20X magnification).
