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. 1979 May 15;35(5):699-701.
doi: 10.1007/BF01960406.

Are there cyclic variations in estradiol secretion in the non-pregnant rabbit?

S Batra, K Källstrand

Are there cyclic variations in estradiol secretion in the non-pregnant rabbit?

S Batra et al. Experientia. .

Abstract

Plasma estradiol-17 beta (E2) concentration was measured in 5 adult non-pregnant rabbits each in 3 different seasons (January, April and September). Blood samples were taken from each rabbit every other day. There was a considerable variation in plasma E2 levels from one sampling day to another, irrespective of the season. The pattern of variation in E2 levels in individual rabbits tended to be cyclic and this cycle was roughly of the order of 8 days. There was no correlation between changes in E2 levels and those in the vaginal appearance.

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