Ochotona rufescens

Results from the vaginal smears suggest that pikas are receptive during both proestrus and estrus. Puget (1973), in his work on the Afghan pika (Ochotona rufescens), suggested that these animals have a pseudo-cycle, as in the rabbit. Such a pseudo-cycle is not characterized by spontaneous ovulation, rather, ovulation is induced by copulation. 

Puget, A., 1973, Etude anatomique, physiologique et biochemique de I Ochotone afghan (Ochotona rufescens rufescens) envue de son utilization comme animal de laboratoire. These Sci. Toulouse. 

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See also in sourсe #XX -- [ ]

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