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Updated: Jul 15, 2026

Rodent Estrous Cycle Monitoring Utilizing Vaginal Lavage: No Such Thing As a Normal Cycle
Published on: August 30, 2021
[Light modes and ovulation function in rats in ontogenesis]
Abstract:
Enhancement of illumination was shown to lead to occurrence of early and more obvious age-dependent changes of ovulation cycle in rats as compared with the same changes in animals staying in conditions of light deprivation or standard illumination. The effect of 24-hour illumination during a year induced more obvious and still earlier changes of the estrus cycle that the effect of natural illumination in the North-West of Russia with its peculiar yearly photo-periodicity (short light day in the autumn-winter period and "white nights" in the spring-summer period).
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09:01Performing Vaginal Lavage, Crystal Violet Staining, and Vaginal Cytological Evaluation for Mouse Estrous Cycle Staging Identification
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