Abstract
Summary
1. Increased amounts of nuclear DNA were found in basal cells during periods of augmented growth in the estrous cycle. 2. These changes in nuclear DNA parallel the mitotic activity of the basal cells. 3. Exfoliated basal cells containing intermediate and tetraploid amounts of DNA were found only during early proestrus. 4. The paucity of a tetraploid nuclear population during estrogenic stimulation may indicate rapid cellular division once DNA synthesis has occurred.
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