Studies on Oogenesis in the Early Postnatal Pig Ovary
Open Access
- 1 February 1972
- journal article
- research article
- Published by Oxford University Press (OUP) in Biology of Reproduction
- Vol. 6 (1) , 46-50
- https://doi.org/10.1093/biolreprod/6.1.46
Abstract
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.Keywords
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