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Online Journal of Veterinary Research

 Volume 23 (12):1191-1194, 2019

 Effect of unilateral and bilateral ovariectomy on blood progesterone, estradiol and fertility in  dogs.


Saad Mohsen AL-Sariy1, Salah Hassan ALwan2, Ihsan A Habeeb3 and Amal M Hassan4


Department(s) of Surgery and Obstetrics, College(s) of Veterinary Medicine, 1,2 Al-Qasim Green University. 3Basrah University, 4Allergic and Asthma Center, Babylon, Iraq.




AL-Sariy SM, ALwan SH,  Habeeb IA, Hassan AM., Effect of unilateral and bilateral ovariectomy on blood progesterone, estradiol and fertility in  dogs, Onl J Vet Res., 23 (12):1191-1194, 2019.  We report effect of unilateral versus bilateral ovariectomy on blood progesterone and estradiol in sixteen 1-1.5 year old 15-20kg stray dogs at surgery and 30 days later. Groups of 4 dogs each were subjected to unilateral left or right or bilateral ovariectomies. Controls (n=4) were normal dogs. Blood was taken before (Day 0) surgery and 30 days later for sex hormones measured by radioimmunoassay. Compared with controls in dogs with bilateral ovariectomy progesterone declined 94% by day 30 (P < 0.01) but there was no significant change  (P > 0.05)(~-66%) in estradiol values. In dogs with left or right ovariectomy, estradiol declined ~8% (P < 0.01) with again no change (P > 0.05) in progesterone. Results suggest that removal of one ovary in dogs maintains normal sex hormone levels by 30 days.


Keywords: Ovariectomy, unilateral, bilateral, progesterone, estradiol.