Fig. 4From: Trophoblast differentiation, invasion and hormone secretion in a three-dimensional in vitro implantation model with rhesus monkey embryosComparison of chorionic gonadotropin secretion in embryos derived from the same oocyte donor with less extensive development (a, b) or advanced development (c). Chorionic gonadotropin secretion profiles, illustrated in panel (d), from those three embryos showed higher CG secretion coincident with more advanced development of the embryo and trophoblastic shell. Scale bar = 100 μmBack to article page