Abstract:
The reproductive development of cattle is must to hasten the production of milk
and meat. It relies mostly on the quality of oocytes. Thus the present study was
carried out to sort out the superior ovary to be used in further research. Cow
ovaries were collected from slaughter house, processed and categorized as right
or left and ovaries with or without corpus luteum (CL). Morphology of ovaries
were studied on the basis of length (cm), width (cm), weight (g), total number
of follicles on the surface of each category ovaries, number of follicles
aspirated, total number of cumulus-oocyte-complex (COCs) and then graded as
normal and abnormal. Significantly (p<0.05) higher mean weight (3.47±0.34 vs
2.44±0.32), length (1.94±0.06 vs 1.71±0.07) and width (1.36±0.06 vs
1.09±0.05) were found in right ovaries than left. Forty seven per cent of right
and 20% of left ovaries were found with CL. Numerically higher number of
normal (0.97±0.16 vs 0.67±0.15) and total (1.60±0.18 vs 1.40±0.21) COCs was
found in left ovaries than right ovaries whereas abnormal COCs were higher in
right ovaries (0.73±0.14 vs 0.63±0.13). On the other hand, in comparison
between with and without CL ovaries, significantly (p<0.05) higher mean
weight (3.81±0.38 vs 2.53±0.29), length (2.04±0.07 vs 1.72±0.06) and width
(1.45±0.06 vs 1.11±0.05) were found in with CL ovaries than without CL. The
average number of normal COCs of with CL ovary (0.75±0.19) was lower than
that of without CL (0.85±0.13) but they are not significant (p<0.05). Finally, it
can be concluded that, oocytes from left ovaries in comparison to right and
without CL in comparison to with CL are superior in the context of selection of
oocytes for embryo development.
Description:
A Thesis
Submitted to the Department of Animal Production and Management
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE (MS)
IN
ANIMAL SCIENCE
