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. 2016 Jul 28;2(7):e00135. doi: 10.1016/j.heliyon.2016.e00135

Fig. 2.

Fig. 2

Intersection-counting for surface density (Sv). A grid of parallel lines superimposed on a field of a placental section for intersection-counting for the determination of Sv of the trophoblast. The point where the line passes from the intervillus space into the villus is counted as one intersection.Trichrome stain. x285.