Morphogenesis of Syncytiotrophoblast in vivo: An Autoradiographic Demonstration

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Science  26 Jul 1963:
Vol. 141, Issue 3578, pp. 349-350
DOI: 10.1126/science.141.3578.349


In an in vivo autoradiographic study of immature primate trophoblast, tritiated thymidine was first found only in nuclei of cytotrophoblast but after 22 hours, labeled nuclei appeared in syncytiotrophoblast as well. Hence syncytiotrophoblast of the monkey appears to originate by differentiation of cytotrophoblast.