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Biology of Reproduction, Vol 6, 46-50, Copyright © 1972 by Society for the Study of Reproduction

Studies on Oogenesis in the Early Postnatal Pig Ovary

J. FULKA 1, V. KOPECcaronNYacute 1, , and I. TREBICHAVSKYacute 2

1 Czechoslovak Academy of Sciences, Laboratory of Animal Genetics, Libecaronchov, Czechoslovakia
2 Institute of Microbiology, Laboratory of Electron Microscopy, Prague, Czechoslovakia


Oogenesis in the pig was studied by means of autoradiography after injection of [3H]-thymidine at birth or at 7, 14, and 35 days of age, respectively. Transformation of oogonia to oocytes, detected by premeiotic DNA synthesis, was observed at all times. The frequency of transformation decreased with age and was characterized by high variability. At birth, from 1.8 to 9.3% germ cells incorporated [3H]thymidine. At 35 days oocytes were labeled only exceptionally but small nests of oogonia were still observed. From these results it can be concluded that the transformation of oogonia to oocytes in the pig continues at least up to the age of 35 days.

Submitted on February 1, 1971






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Copyright © 1972 by the Society for the Study of Reproduction.