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. 2008 Jan;212(1):31–41. doi: 10.1111/j.1469-7580.2007.00839.x

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© 2007 The Authors Journal compilation © 2007 Anatomical Society of Great Britain and Ireland

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Fig. 5 — Immunoperoxidase staining for fibronectin. Placenta of a control rat on day 14 of pregnancy (a–c): Strong immunoreaction is observed in the mesenchyme of the umbilical cord (UC) and surrounding the trophoblast cells near the maternal blood vessels (mBV) in the metrial gland (MG). No immunoreaction for fibronectin is observed in the mesenchyme of the labyrinth region. Placenta of a diabetic rat on day 14 (d–f): The immunoreaction is similar to that observed in control placentas in the mesenchyme of the UC and the stroma of the MG. However, the immunoreaction is strong in the mesenchyme of the labyrinth (L) region. Immunoperoxidase staining for laminin. Placenta of a control rat on day 20 (g–i). Immunoreaction is observed in the mesenchyme of the UC and surrounding the mBV of the MG (g–h). In the mesenchyme of labyrinth near to umbilical cord (i) the immunoreaction is diminished compared with the previous days. Placenta of diabetic rat on day 20 (j–l): The immunoreaction is similar to that observed in the control samples. Scale bar = 100 µm.