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Science 30 March 1973:
Vol. 179. no. 4080, pp. 1332 - 1333
DOI: 10.1126/science.179.4080.1332
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Articles

Observations of Apparent C-Type Particles in Baboon (Papio cynocephalus) Placentas

S. S. Kalter 1, R. J. Helmke 1, M. Panigel 1, R. L. Heberling 1, P. J. Felsburg 1, and L. R. Axelrod 1

1 Southwest Foundation for Research and Education, San Antonio, Texas 78284

Ultrastructural investigations have revealed the presence of apparent endogenously derived C-type particles in the placental villi of each of 13 baboons studied. Both budding and mature forms were observed in the syncytiotrophoblast of these animals at various stages of pregnancy.


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