Figure 6
From: Growth and development of the placenta in the capybara (Hydrochaeris hydrochaeris)
Chorioallantoic placenta of the capybara at the limb bud stage II. (A) Immunostaining for PCNA indicates proliferation of the cytotrophoblasts lining a fold. Inset is a negative control (neg). (B) Immunostaining for PCNA also reveals nests of cytotrophoblasts within the spongy trophoblast pad. (C) Ultrastructure of cytotrophoblasts. TEM. (D) Detail of the cytotrophoblasts. TEM. Scale bars = 40 μm (A-B), 5 μm (C), 1 μm (D).