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ARs first appear in developing hamster FMNs by P4 in females. High-power photomicrographs (original magnification, 200×) of developing female hamster FMNs at P0 (a, f), P2 (b, g), P4 (c, h), P6 (d, i), and P8 (e, j) are shown. Left, Sections incubated with anti-AR antibody PG-21. Right, Adjacent sections processed without primary antibody.
