Ultrasonographic studies on follicular dynamics in indigenous and crossbred cows
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Department of Animal Reproduction, Gynaecology and Obstetrics College of Veterinary and Animal Science Rajasthan Agricultural University Bikaner
Abstract
Ultrasonographic studies on ovarian follicular dynamic revealed that indigenous and crossbred cows were having 2 or 3 wave pattern with predominance of 2 wave pattern during spontaneous normal estrous cycle. In two wave pattern the first and second waves persisted for 14.6±0.9 to 15.3±1.0 and 9.75±0.8 to 10.7±1.5 days while in the three wave pattern first, second and third waves persisted for 14.3±0.6 to 15.4±0.6, 10.45±1.1 to 12.7±0.4 and 6.5±1.8 to 7.6±0.3 days, respectively, in both the types of cows. Significantly higher persistency (p<0.05) was recorded in the anovulatory wave/s than the ovulatory follicular wave in both the types of cows irrespective of 2 or 3 wave pattern.
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