الكاتب: Multiple References

Cystic follicles are one of the most common causes of reproductive failure in cattle (review by Peter, 2004). Ovarian cysts are defined as pathologic follicular structures (‡2.5 cm in diameter), which persist for 10 days or longer in the absence of a functional corpus luteum (CL) (Seguin et al., 1976). When a cyst develops, the follicles continue to enlarge to an abnormal size instead of ovulating and transforming into a CL. The presence of ovarian cysts is associated with an abnormal pattern of estrus behavior (nymphomania, anestrus, etc.) and the cow is prevented from having a regular estrus cycle. This impairs reproductive efficiency because cows cannot become pregnant until the cyst regresses spontaneously or responds to luteolytic treatment.