Figure 2: Temporal appearance of trophoblastic subtypes. Placental tissue with underlying mesometrium was sequentially harvested from pregnant Long Evans rats starting from E12 to E19. H&E stained sections were evaluated for appearance and distribution of trophoblastic subtypes within junctional zone (A-H) and mesometrium (I-J) [original magnification X 200]. N=2 dams per group (litter size varied from 7-to-13).