Ovarian follicular wave patterns, oestrus interval and ovulation rate in oestrus synchronised Kedah-Kelantan cows
Amri, Azizah and Omar, Mohamed Ariff and Haron, Abd Wahid and Yaakub, Halimatun and Johari, Ahmad (2012) Ovarian follicular wave patterns, oestrus interval and ovulation rate in oestrus synchronised Kedah-Kelantan cows. Journal of Tropical Agriculture and Food Science, 40 (2). pp. 233-243. ISSN 1394-9829; ESSN: 2289-9650
Official URL: http://ejtafs.mardi.gov.my/index.php/publication/i...
The relationship between 2- and 3-follicular wave patterns on progesterone hormone profiles, oestrus interval, ovulation time and pregnancy rate in Kedah- Kelantan (KK) cows were studied. A total of 30 primiparous and multiparous KK cows were inserted intravaginally with controlled internal drug releasing device (CIDR®) for 7 days, followed by intramuscular injection of 25 mg prostaglandin 2 days prior to CIDR® removal. The study indicated that the oestrus cycle length and proportion of pregnant cows were not significantly different between the 2- and 3-follicular wave patterns. However, follicle emergence in the 3-wave pattern was 4.1 days later than the 2-wave pattern while the dominant follicle in the 3-wave pattern took 4.3 days earlier to achieve the maximum diameter. The dominant follicle took a respective 6.4 and 5.4 days for 2-and 3-wave patterns to become dominant at days 9.8 and 9.5 respectively. The progesterone concentration at the time of emergence of the first dominant follicle (DF) was lower in 3-wave pattern compared to 2-wave pattern. Oestrus intervals, ovulation time and pregnancy rates were not significantly correlated in the 2- and 3-wave patterns. There was no relationship between ovarian follicular wave patterns, ovulation time and pregnancy rates during the oestrus cycle in synchronised KK cows.
Repository Staff Only: Edit item detail