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A and B: photomicrographs of kisspeptin 1 (Kiss1) and c-fos mRNA in situ hybridization in OVX + E2 rats 30 min after vehicle or senktide treatment. Red stain indicates cells expressing Kiss1 mRNA; white grains indicate cells expressing c-fos mRNA. Scale bars, 25 μm. C: percentage of Kiss1 cells expressing c-fos mRNA in the arcuate nucleus (Arc). Values are means ± SE. *P < 0.01 (Student's t-test).
