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2- EMADY M., NOAKES D.E., ARTHUR G.H., Analysis of reproductive function of the ewe based on post mortem examination, Vet. Rec., 1975, 96, 261-266

3- LONG S.E., Some pathological conditions of the reproductive tract of the ewe, Vet. Rec., 1980, 106, 175-177

4- MOBINI S, HEATH AM, PUGH DG. Theriogenology of sheep and goats. In: Pugh DG, Sheep and goat medicine. Philadelphia: WB Saunders Co, 2002, 129–186.

5- SMITH K.C., LONG S.E., PARKINSON T.J., Abattoir survey of congenital reproductive abnormalities in ewes, Vet. Rec., 1998, 143, 679-685

6- SMITH K.C., PARKINSON T.J., LONG S.E., Abattoir survey of acquired reproductive abnormalities in ewes, Vet. Rec., 1999, 144, 491-496

7- SMITH K.C.,PARKINSON T.J., PEARSON G.R., LONG S.E., Ovarian fusion in sheep, J. Anat., 1996, 189, 199-204

8- SMITH M.C., Anestrus, pseudopregnancy and cystic follicles, In Current therapy in theriogenology, Philadelphia: WB Saunders, 1986, 585-586

9- SOKKAR S.M., KUBBA M.A., Pathological studies on the fallopian tubes of Ewes, Zbl. Vet. Med. A, 1980, 27, 118-122

10- VAUGHAN E.K., LONG S.E., PARKINSON T.J.,SMITH K.C., NOAKES D.E., Ovarian hypoplasia in Lleyn ewes, Vet. Rec., 1997, 140, 100-101

11- WRIGHT P.J., GALLOWAY D.B., CLARKE I.J., Gonadotrophin secretion in ewes with bilateral gonadal hypoplasia., Aust. Vet. J., 1996, 73, 157-158