M. R., Jainudeen and Tan, H. S. and Bongso, T. A. (1981) Plasma progesterone profiles in relation to postpartum ovarian activity in the swamp buffalo. In: Proceedings of the Second Coordination Meeting of Regional Cooperative Agreement on the Use of Nuclear Techniques to Improve Domestic Buffalo Production in Asia, 2-6 March 1981, Chulalongkorn University Bangkok, Thailand.
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Ovarian activity in 38 suckled swamp buffaoes (Bubalus bubalis) was monitored by rectal palpation, oestrus detection and plasma progesterone radio-immunoassay from calving to approximately 150 days postpartum. Three categories of ovarian activity were diagnosed clinically : A corpus luteum (CL) with detected oestrus (21%), a CL with nondetected oestrus (42%) and no CL with non-detected oestrus or anestrus (37%). Plasma progesterone levels confirmed the clinical diagnosis of the presence or absence of a palpable CL except that progesterone levels were low (<0.2ng/ml) when a CL was palpable in 67% of the cows between Day 30 and 60 postpartum. During the oestrous cycle, plasma progesterone levels were low (0.24±0.12ng/ml) during oestrus (Day 0), rose to detectable levels (0.42±0.21ng/ml) by Day 6, reached a peak concentration (1.51±0.35ng/ml) on Day 15 and then declined to basal levels (0.2ng/ml) on Day 22. A synthetic prostaglandin F₂α analog induced oestrus and ovulation in cycling buffaloes but neither a synthetic gonadotropin releasing hormone nor a progesterone releasing intravaginal device was effective in initiating ovarian activity in anestrous buffaloes.
|Item Type:||Conference or Workshop Item (Paper)|
|Faculty or Institute:||Faculty of Veterinary Medicine|
|Deposited By:||Samsida Samsudin|
|Deposited On:||07 Oct 2011 02:04|
|Last Modified:||20 Nov 2013 00:45|
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