Present study has been design to observe the ultramicroscopic structure of Gonadotrophs in the female bat Taphozous nudiventris kachhensis during the various phases of reproductive cycle. During the present study specimen were collected during Estrous and pregnancy to know the probable role of Gonadotrophs (FSH, LH) in respective stage of reproductive cycle. After collecting female specimen they were weight and dissect out for the pituitary gland and then those were fixed in ice cold gluteraldehyde. Gonadotrophs (FSH and LH) are mostly frequently observed cell types after Somatotrophs cells in the pars distalis of the female bat Taphozous nudiventris kachhensis. FSH cell during estrus is large, ovoid to polyhedral in shape with irregular shaped nucleus. Cell cytoplasm shows well developed Golgi apparatus, rough endoplasmic reticulum and mitochondria this indicating active state. During early pregnancy cytoplasm of FSH cell appears vacuolated because of dilation of rough endoplasmic reticulum. Mitochondria are spherical to rod shaped with lamellar cristae. During late pregnancy rough endoplasmic reticulum shows dilation. Golgi complex is juxtanuclear in position and mitochondria are numerous. LH cells during early part of gestation are large with bilobed nucleus. Cell cytoplasm shows well developed rough endoplasmic reticulum heavily dotted with ribosomes and contains large number of secretory granules. Hypertrophied LH cell in pars distalis of bat during late pregnancy shows well developed rough endoplasmic reticulum occupies major part of cytoplasm. Golgi zone is well developed with dilated saccules. Secretory granules are very few.
The present study shows the cyclical alternation in the activity of adrenal gland of the bat Hipposiderous lankadiva during sexually quiescence and sexually active period of the reproductive cycle. The adrenal gland is made up of steroidogenic and chromaffin cells. The gland during sexually quiescence period is much smaller than that of sexually active period. The cortex is completely encircles the medulla in Hipposideros lankadiva. The medulla in this species consists of epitheloid cells arranged in smaller groups surrounded by blood capillaries. The Zona glomerulosa consist of numerous bulbous structures which appear as acinus like group of cells. The Zona fasciculata is seen in the form of straight column; one or two cells thick arranged radially that run toward the center of the gland. These cords consist of large polyhedral vacuolated cells. The Zona reticularis has the cells disposed in the form of anastomosing cords and vary in shape and size. The cells are hypertrophied. Cytoplasm is eosinophilic with darkly stained nucleus and more vacuolated. Medulla is entirely surrounded by cortical zone it consist of groups of chromatin cells separated by blood capillaries.
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