Volume: 48 Issue: 2
Year: 2017, Page: 56-58,
Received: July 1, 2016 Accepted: July 4, 2016 Published: Dec. 31, 2017
The study was envisaged to compare oestrual mucus spinbarkeit value and fertility in crossbred cattle during heat stress and at comfortable phase. A total of 24 apparently healthy cyclic crossbred cows in oestrus were selected for the study during the phase November – January (Group I), which was identified as comfortable phase. Another group of 20 animals in oestrus were also selected during March- May (Group II), which was identified as heat stress phase. Cervico- vaginal discharge during oestrus was collected and stretchability measured by spinbarkeit test. All the animals were inseminated 12 h after the onset of oestrus and pregnancy of non-returned animals was determined by rectal examination on day 45 post AI. Mean spinbarkeit values of conceived and non conceived animals in Group I were 16.56 ± 0.65 cm and 12.80 ± 0.50 cm respectively with overall mean of 14.20 ± 0.54 cm. The corresponding values of group II animals were 17.60 ± 1.43 cm, 16.53 ± 1.31 cm and 16.8 ± 1.03 cm. Significantly higher spinbarkeit values were obtained in conceived animals of the both the groups. Conception rates during comfortable phase and at heat stress were 37.5 and 25 per cent respectively.
Keywords: Spinbarkeit values, THI Index, fertility, heat stress, cows
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