Ultrastructural changes in the adenohypophysis, adrenal gland activity, and desynchronization of the oestrous cycle following unpredictable stress in the rat

Irina Pollard, K. D. Cairncross

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An ultrastructural study of the adenohypophysis, after exposure of female Wistar rats to a signalled unpredictable 5- and I5-day stress regimen, is described. Cellular activity of the adenohypophysis correlated well with the circulating levels of corticosterone. Intense secretory activity was observed in all tropic cell types at 5 and 15 days although the observed differences generally were greater in the 5-day stressed group. It was observed that the oestrous cycles of 40 and 100 % of the rats became desynchronized over the 5- and I5-day stress period respectively.

Original languageEnglish
Pages (from-to)559-572
Number of pages14
JournalAustralian journal of biological sciences
Issue number6
Publication statusPublished - 1977


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