Reproduction is a high priority function of all mammalian species.
Strategies used to perpetuate species vary greatly, but in general they
evolved to improve the success of survival of the offspring. The
reproductive state of an individual at any particular time reflects an
integration and coordination of both external and internal signals and
not just a simple response to a single environmental factor. I Many
mammals are seasonal breeders and respond to annual climatic changes by
adaptive alterations in physiological as well as in histoarchitechtural
status in anticipation of the coming season. The switching on and off of
reproductive functions during the annual breeding cycle of bats is the
most striking example of such photoperiodically induced process.Although
Chiropterans are the second largest order of mammals, detailed
reproductive patterns and their associated changes in the Sertoli cell
have been documented only in few species. Hence, present investigation
was carried out on Taphozous kachhensis and Pteropus giganteus giganteus
of Bramhapuri Forest Range (20060' 80.42"N and 79086 13.36" E) in
Chandrapur district of Maharashtra, India Maharashtra, India.