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Sagittal sections of an 18-week human female fetal reproductive tract immunostained with PAX2 (A–B) and FOXA1 (C–D). PAX2-reactive epithelial cells line the lumen of the female reproductive tract from the uterine tube to the cranial aspect of the vagina (A–B). PAX2 staining is present, but weak in vaginal epithelium (B). FOXA1-reactive epithelial cells line the lower (caudal) vagina (C–D). Scale bar in A also refers to D. Scale bar in D also refers to C.
