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HOXA11 immunohistochemistry of 14- and 18-week human fetal female reproductive tracts in sagittal section. (Sagittal sections of the human fetal female reproductive tract at 14 weeks of gestation B, C & F). Sagittal sections of the human fetal female reproductive tract at 18 weeks of gestation (A, D & E). Note nuclear staining of uterine mesenchymal cells, but not vaginal mesenchymal cells.
