Does risk of small mustelid predation affect the oestrous cycle in the bank vole, Clethrionomys glareolus?

Risk of small mustelid predation suppresses the reproduction of female bank voles. When exposed to predation risk, females have fewer but sometimes abnormally longer oestrous cycles. The suppression can be a direct effect of the predators' odor. Indirectly also, reproductive cycling is affected as males exposed to predator risk avoid advertising their presence and odor cues that would have stimulated females. Further research is needed to determine the selective advantage of oestrous suppression on future survival.