Determination of follicular wave development in oestrus synchronised beef cows

Yaakub H., . and Wahid H., . and Ahmad J., . and Azizah A., . and Ariff O.M., . Determination of follicular wave development in oestrus synchronised beef cows. pp. 53-66. ISSN 1394-3227

A study was conducted to determine the follicular wave development in terms of dominant follicles size number of follicular waves and follicles existing at pre- and post-ovulation stage and length of oestrous cycle in oestrus synchronised beef cows. Thirty cows consisting of 3 breedtypes: KK (n10) Brakmas (n10) and Charoke (n10) were inserted with controlled internal drug releasing (CIDR) device containing 1.38 g progesterone for 7 days and given intramuscular injection of a synthetic prostaglandin analogue of 25 mg prostaglandin two days prior to CIDR withdrawal. It was shown of BK CK and KK cows had 45 35 and 20 3-follicular waves pattern respectively. BK cows had higher number of cows having 3-follicular waves (P0.05) compared with KK and KK had a higher (P0.05) percentage of cow having 2-follicular waves pattern compared with BK and CK cows. In pre ovulation stage the number of follicles at emergence was significantly higher (P0.05) in KK (4.4 0.6) followed by CK (2.6 0.4) and BK (3.2 0.4). However there was no significant difference (P0.05) observed in terms of mean diameter of follicle at emergence stage in the three breedtypes. The mean diameter of ovulatory follicular development was significantly larger (P0.05) in BK (14.2 0.1 mm) followed with the other two breedtypes CK (12.2 0.1 mm) and KK (11.8 0.5 mm) and was also significantly faster to become dominant (P0.01) compared to the other two breedtypes. In post ovulation stage or at first follicular wave development the number of follicles at emergence of KK BK and CK was 3.8 0.9 3.2 0.5 and 2.7 0.7 respectively. The first dominant follicle reached maximum diameter of 11.40.08 mm; 13.10.08 mm and 13.10.07 mm in KK BK and CK respectively with no significant difference detected among the breeds studied (P0.05). Similarly there was also no significant difference (P0.05) of the dominant follicle diameter was observed in the second and third (ovulatory follicle) follicular waves patterns among the three breeds of cows studied. The mean diameter of ovulatory follicle in KK was 10.20.1 mm BK 11.60.10 mm and CK 10.70.1 mm in KK BK and KK cows respectively. There was no significant difference (P0.05) found among the three breeds of cows studied for mean length of oestrous cycle. In conclusion the results of the present study indicated there was no difference on the follicular wave development in terms of dominant follicles size in pre-ovulation first second and third follicular wave development; follicles existing at post-ovulation stage and length of oestrous cycle in KK BK and CK cows. However in terms of the number of follicular waves BK and CK cows had a higher proportion of 3- and 2-follicular waves development than KK cows. and the number of follicles existing at pre-ovulation stage in KK and BK cows were predominantly higher CK cows.

Full text available from: Official URL: http://www.msap.my/mjas16/6-Azizah%20MJAS%2016%281...

Abstract

A study was conducted to determine the follicular wave development in terms of dominant follicles size number of follicular waves and follicles existing at pre- and post-ovulation stage and length of oestrous cycle in oestrus synchronised beef cows. Thirty cows consisting of 3 breedtypes: KK (n10) Brakmas (n10) and Charoke (n10) were inserted with controlled internal drug releasing (CIDR) device containing 1.38 g progesterone for 7 days and given intramuscular injection of a synthetic prostaglandin analogue of 25 mg prostaglandin two days prior to CIDR withdrawal. It was shown of BK CK and KK cows had 45 35 and 20 3-follicular waves pattern respectively. BK cows had higher number of cows having 3-follicular waves (P0.05) compared with KK and KK had a higher (P0.05) percentage of cow having 2-follicular waves pattern compared with BK and CK cows. In pre ovulation stage the number of follicles at emergence was significantly higher (P0.05) in KK (4.4 0.6) followed by CK (2.6 0.4) and BK (3.2 0.4). However there was no significant difference (P0.05) observed in terms of mean diameter of follicle at emergence stage in the three breedtypes. The mean diameter of ovulatory follicular development was significantly larger (P0.05) in BK (14.2 0.1 mm) followed with the other two breedtypes CK (12.2 0.1 mm) and KK (11.8 0.5 mm) and was also significantly faster to become dominant (P0.01) compared to the other two breedtypes. In post ovulation stage or at first follicular wave development the number of follicles at emergence of KK BK and CK was 3.8 0.9 3.2 0.5 and 2.7 0.7 respectively. The first dominant follicle reached maximum diameter of 11.40.08 mm; 13.10.08 mm and 13.10.07 mm in KK BK and CK respectively with no significant difference detected among the breeds studied (P0.05). Similarly there was also no significant difference (P0.05) of the dominant follicle diameter was observed in the second and third (ovulatory follicle) follicular waves patterns among the three breeds of cows studied. The mean diameter of ovulatory follicle in KK was 10.20.1 mm BK 11.60.10 mm and CK 10.70.1 mm in KK BK and KK cows respectively. There was no significant difference (P0.05) found among the three breeds of cows studied for mean length of oestrous cycle. In conclusion the results of the present study indicated there was no difference on the follicular wave development in terms of dominant follicles size in pre-ovulation first second and third follicular wave development; follicles existing at post-ovulation stage and length of oestrous cycle in KK BK and CK cows. However in terms of the number of follicular waves BK and CK cows had a higher proportion of 3- and 2-follicular waves development than KK cows. and the number of follicles existing at pre-ovulation stage in KK and BK cows were predominantly higher CK cows.

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Item Type:	Article
AGROVOC Term:	Cows
AGROVOC Term:	Beef
AGROVOC Term:	Follicle stimulating hormone
AGROVOC Term:	Oestrous cycle
AGROVOC Term:	Oestrus synchronization
AGROVOC Term:	Malaysia
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	26 Apr 2025 14:47
URI:	http://webagris.upm.edu.my/id/eprint/21542

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