الفهرس 
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Abstract
Cystic ovarian disease (COD) is a common ovarian disorder
diagnosed in dairy cattle and is an important cause of reproductive failure
and economic loss for the dairy industry and it has been accepted that
cows with COD were infertile until the condition resolved.
The importance of studying cystic conditions lies in the
consequences they have for the dairy producer. As most cysts are
anovulatory, they cause severe delays in the reproductive efficiency of
affected animals, leading to decreased milk production over time. This
inevitably can affect the bottom line and cause the dairy producer to lose
money.
The objectives of this study were:
1- To evaluate different therapeutic strategies of COD treatment using
terms of the reproductive parameters as estrus detection rate, interval
from treatment to first estrus, pregnancy rate after first service, return
rate, pregnancy rate after second service and total pregnancy rate by 3
different treatment methods.
2- To evaluate the reproductive efficiency of cystic cows after diagnosis
and treatment according to days in milk (DIM).
3- To measure the level of progesterone at the beginning and at the end
of treatment.
A total of 85 Holstein dairy cows suffering from cystic ovarian
follicles were divided into 4 groups based on the type of treatment as
following:
Group 1 (Control): this group included 10 cystic Holstein dairy cows
left without treatment.