Fig. 5
From: Is neonatal uterine bleeding responsible for early-onset endometriosis?
Hematoxylin and eosin staining (HE stain) (A, E, G, I, L), Papanicolaou (Pap) stain (B) and immunocytochemcial/histochemical staining of PGR (C, F, J), PRL (D, H, K), and CD31 (M, N) in neonatal uterine blood (NUB), neonatal endometria, and neonatal vaginal epithelium. An abundant collection of vaginal squamous cells (VSCs) in NUB and a variable positive PGR- and PRL- stained cells were observed in VSCs (C, D), neonatal endometria (F, H) and in neonatal vaginal epithelial cells (J, K). Both superficial and deeper part of vaginal wall shows increased number of CD31-stained micro-vessels (M, N). Scale bar = 50 and 100 μm