FIG. 2.

FSHR expression in human umbilical cord at 38–40 wk gestation. Tissues were stained with antibody FSHR-323 IgG2a (brown) and counterstained with hematoxylin (blue). A) Umbilical artery (magnification ×100; inset ×200). Labeled are the endothelium (UAE), the inner layer of smooth muscle (M₁), and the outer layer of smooth muscle (M₂). B) Umbilical vein (magnification ×100; inset ×200). Labeled are the tunica intima (TI), tunica media (TM), and Wharton jelly (WJ). C) Cord amnion (magnification ×200; inset ×600). Labeled are the amniotic epithelium (AE) and Wharton jelly (WJ). Corresponding negative controls stained with nonimmune IgG2a at the same concentration are shown in Supplemental Figure S3.