Surface count and histological distribution ratio of ovarian follicles in buffalo
2009
Bansal, Neelam | Saigal, R.P.
The present study was conducted on 18 ovaries of adult buffaloes, 3.5_15 year-old, during different phases of reproductive cycle to observe the distribution of different categories of follicles present on the surface and in histological sections of ovaries. Small size follicles (1 to 2 mm) were mainly found embedded in the cortex and only few follicles appeared on the surface of ovary. The number of such follicles in the histological sections was 33, 33.67, 2.70 and 6.50 times higher than the number of follicles that were counted on the surface during follicular, early luteal, mid luteal and late luteal phase of the reproductive cycle, followed a reverse pattern, i.e. the number of follicles counted on surface increased and those which appeared histomorphologically decreased. The phase-wise distribution of follicles showed that ratio of surface to histomorphological count was minimum (1:1.54) in mid-luteal phase, which increased to 1:2.44 in late luteal, 1:4.48 in follicular and maximum of 1:7.86 in early luteal phase. From these observations it may be stated that only the large size follicles appeared on the surface of ovary and the small size follicles remained buried in the ovarian cortex, which leads to an underestimation (on surface count) of total follicles present in ovaries of buffaloes may be related to the lower reproductive efficiency.
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