| Introduction: The origin of neonatal oocyte development is unknown. However, estrogen
plays an essential role during development of the female reproductive system. Anastrozole is
used as both ovulation stimulating and an anticancer drug. The aim of this study was to
evaluate the impact of Anastrozole on follicular development and differentiation in mice.
Materials and methods: In the present study, 30 adult female and 15 adult male mice were
used. Then, two female mice (at their sterous cycle) were kept with one male mouse in a cage
for mating. After observing the vaginal plug (considered as first day of pregnancy) female
mice were divided into two groups of control and experimental. In the experimental group, on
the 14th day of pregnancy the mice received anastrozole (50 mg/Kg, i.p. injection). After
delivery 16 pups were selected in each group. Then 2, 4 and 7 day pups were studies for
primordial, primary and growing follicles number.
Results: According to the morphometric studies, in the 2 day pup, the breakdown was not
complete in treatment group. However, the number of primordial, primary and growing
follicles of 4 and 7 day pups were not significantly difference in the control and experimental
groups.
Conclusion: According to the studies, estrogen is necessary for follicular breakdown and
maternal anastrozole can reduce the primordial follicles. However, maternal anastrozole and
estrogen depression couldn‟t effect on the histology of ovarian follicle in neonatal mouse. |