Figure 3.

Analysis of placental structure. (a) Placental HE staining results of the three groups. The magnification is 20x in the upper panels. (b–d) Bar charts show the labyrinth and sponge of the placenta. (e) An immunohistochemical analysis of laminin in the placenta. The magnification is 400x in the panels. Pseudocolour is used to indicate foetal blood vessels (red) and the maternal blood sinusoid (blue) in the placental labyrinth. (f–g) Bar graphs show the quantitative results of the red and blue areas of all placentas in each group, indicating the area of the maternal blood sinusoid (MBS) and foetal blood vessels (FBV). The statistical analysis was based on the results of all placentas in each group. Data are expressed as the mean ± SD. ^∗P < 0.05 between two groups.