Low oocyte quality related with the aging ewes
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Abstract
This study was conducted to know the effect of ewe age on oocyte quality as well as the relations
between oocyte viability and normal uterine condition. Eighty three (83) reproductive systems of
non-pregnant ewes were collected from Al-shulla abattoir. The Total oocytes were aspirated from
right ovaries reached 61.45% and 38.55% from left ovaries. Immediately after aspiration, the oocytes
were examined by light microscopic and conceded as mature if surrounded completely with cumulus
oopherus. While the stained oocytes by trypan blue were conceded as dead oocytes and excluded.
According to ewes age the oocytes were classified into (3) groups, the first group ranged between 1-
2 years, second group 3-6 years and the third group over 6 years. The total oocyte collection from
these groups was 20, 23, 40 oocyte. The results indicated that 14 oocytes (70%), 17(73.91%) and
10(25%) from groups 1, 2, and 3 with cumulus cells, respectively. While the total live oocyte reached
to 60. Normal endometrium was observed in 90%, 95% and 80%for 1,2and 3 groups respectively. It
was concluded from this study that aged ewes showed low quality oocyte with infertile endometrium.
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