Ovarian follicular wave patterns oestrus interval and ovulation rate in oestrus synchronised Kedah-Kelantan cows

Halimatun Yaakub, . and Mohamed Ariff Omar, . and Ahmad Johari, . and Azizah Amri, . and Abd Wahid Haron, . Ovarian follicular wave patterns oestrus interval and ovulation rate in oestrus synchronised Kedah-Kelantan cows. pp. 233-243. ISSN 1394-9829

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.

Full text available from: Official URL: http://jtafs.mardi.gov.my/jtafs/40-2/Ovarian%20fol...

Abstract

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.

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Item Type:	Article
AGROVOC Term:	Cows
AGROVOC Term:	Oestrus
AGROVOC Term:	Ovulation
AGROVOC Term:	Oestrus synchronization
AGROVOC Term:	Pregnancy
AGROVOC Term:	Progesterone
AGROVOC Term:	Hormones
AGROVOC Term:	Prostaglandins
AGROVOC Term:	Emergence
AGROVOC Term:	Livestock management
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24501

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