FIG. 1.

FSHR expression in human placenta and associated tissues at 38–40 wk gestation. Tissues were stained with antibody FSHR-323 IgG2a (brown) and counterstained with hematoxylin (blue). A and B) Chorionic villi (magnifications ×200 [A] and ×600 [B]). Labeled are endothelial cells of the villi vessels (V), the chorionic stromal core (S), and trophoblasts (arrowhead labeled T). C) Amnion-chorion interface, including the amnion, chorion, and maternal decidua (magnification ×200; inset ×600). Labeled are the amniotic epithelium (AE), amniotic fibroblasts (AF), maternal decidua (D), and endothelial cells of the maternal vessels (MV). D) Maternal decidua (magnification ×200; inset ×600). Labeled are decidua strongly stained for FSHR (D₁), decidua moderately stained for FSHR (D₂), chorionic villi (C), and nonspecific staining of neutrophils (N). Corresponding negative controls stained with nonimmune IgG2a at the same concentration are shown in Supplemental Figure S2.