Fig. 4

Expression of E-cadherin on isolated trophoblast cells. Primary trophoblast cells isolated from human term placentas were stained with E-cadherin (green). Nuclei were stained with DAPI (blue). Confocal microscopy, scale bar: 50 μm. a Mononuclear cytotrophoblast cells aggregated by 12 h in culture. b Most cytotrophoblast cells fused to form multinucleated syncytia by 72 h in culture