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Updated: Oct 13, 2026

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Protocol for Studying Extinction of Conditioned Fear in Naturally Cycling Female Rats
Published on: February 23, 2015
Plasma free and total tryptophan during the oestrus cycle, in ovariectomized and in male rats
Abstract:
Plasma free tryptophan was higher during prooestrus and early oestrus than at metoestrus or in ovariectomized or male rats. In contrast, total tryptophan was higher in ovariectomized and male rats than at any time in cycling females.

