Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle
In view of a lack of published information on oestrus synchronization in indigenous beef cattle, the effects of prostaglandin F₂α (PG) on oestrus and fertility in 50 Kedah-Kelantan cows were investigated. In trial I, 30 cows (G1, G2; n = 15) with palpable corpora lutea were given a single PG injecti...
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| Format: | Conference or Workshop Item |
| Language: | English |
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1984
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| Online Access: | http://psasir.upm.edu.my/id/eprint/17864/ http://psasir.upm.edu.my/id/eprint/17864/1/ID%2017864.pdf |
| _version_ | 1848843359578226688 |
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| author | Tan, H. S. Chew, S. T. Haron, Kassim Mak, T. K. |
| author_facet | Tan, H. S. Chew, S. T. Haron, Kassim Mak, T. K. |
| author_sort | Tan, H. S. |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In view of a lack of published information on oestrus synchronization in indigenous beef cattle, the effects of prostaglandin F₂α (PG) on oestrus and fertility in 50 Kedah-Kelantan cows were investigated. In trial I, 30 cows (G1, G2; n = 15) with palpable corpora lutea were given a single PG injection. In G1, insemination was performed after detection of standing oestrus while G2 animals were inseminated at 72 and 96 hr post-treatment. In trial II, 20 animals were given a double injection of PG, 10 days apart, and inseminated at 72 and 96 hr (G3). Eighty percent (12/15) of animals in G1, 100 percent (15/15) in G2 and 100 percent (20/20) in G3 responded to PG treatment, coming into oestrus between days 3 and 6 post-injection. Mean (+ S.D) times to onset of standing oestrus were 86.9 + 17.4 (G1, 83.3 + 29.2 (G2) and 66.5 + 20.4 hr (G3). Individual variations in vulval conformation made interpretation of vulval swelling very subjective and unreliable. Only 11.1% of animals in Trial I and 20% in Trial II exhibited spontaneous vaginal mucus discharge at the induced oestrus. Mean plasma progesterone levels showed a marked decline after PG treatment and standing oestrus coincided well with basal values. Based on progesterone profiles, conception rates were 25% (G1), 33% (G2) and 50% (G3). Conception failure was the primary cause of low pregnancy although embryonic mortality was also detected. Asynchrony of fixed time A.I. and induced oestrus was observe in 10% of animals. |
| first_indexed | 2025-11-15T08:13:47Z |
| format | Conference or Workshop Item |
| id | upm-17864 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:13:47Z |
| publishDate | 1984 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-178642015-05-25T02:18:10Z http://psasir.upm.edu.my/id/eprint/17864/ Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle Tan, H. S. Chew, S. T. Haron, Kassim Mak, T. K. In view of a lack of published information on oestrus synchronization in indigenous beef cattle, the effects of prostaglandin F₂α (PG) on oestrus and fertility in 50 Kedah-Kelantan cows were investigated. In trial I, 30 cows (G1, G2; n = 15) with palpable corpora lutea were given a single PG injection. In G1, insemination was performed after detection of standing oestrus while G2 animals were inseminated at 72 and 96 hr post-treatment. In trial II, 20 animals were given a double injection of PG, 10 days apart, and inseminated at 72 and 96 hr (G3). Eighty percent (12/15) of animals in G1, 100 percent (15/15) in G2 and 100 percent (20/20) in G3 responded to PG treatment, coming into oestrus between days 3 and 6 post-injection. Mean (+ S.D) times to onset of standing oestrus were 86.9 + 17.4 (G1, 83.3 + 29.2 (G2) and 66.5 + 20.4 hr (G3). Individual variations in vulval conformation made interpretation of vulval swelling very subjective and unreliable. Only 11.1% of animals in Trial I and 20% in Trial II exhibited spontaneous vaginal mucus discharge at the induced oestrus. Mean plasma progesterone levels showed a marked decline after PG treatment and standing oestrus coincided well with basal values. Based on progesterone profiles, conception rates were 25% (G1), 33% (G2) and 50% (G3). Conception failure was the primary cause of low pregnancy although embryonic mortality was also detected. Asynchrony of fixed time A.I. and induced oestrus was observe in 10% of animals. 1984 Conference or Workshop Item NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/17864/1/ID%2017864.pdf Tan, H. S. and Chew, S. T. and Haron, Kassim and Mak, T. K. (1984) Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle. In: Feeds and Feeding Systems for Livestock : Proceedings of 8th MSAP Conference, 1984, Genting Highlands, Malaysia. (pp. 181-186). Beef cattle - Breeding Cattle - Fertility Estrus |
| spellingShingle | Beef cattle - Breeding Cattle - Fertility Estrus Tan, H. S. Chew, S. T. Haron, Kassim Mak, T. K. Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle |
| title | Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle |
| title_full | Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle |
| title_fullStr | Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle |
| title_full_unstemmed | Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle |
| title_short | Oestrus and fertility after prostaglandin injection in Kedah-Kelantan cattle |
| title_sort | oestrus and fertility after prostaglandin injection in kedah-kelantan cattle |
| topic | Beef cattle - Breeding Cattle - Fertility Estrus |
| url | http://psasir.upm.edu.my/id/eprint/17864/ http://psasir.upm.edu.my/id/eprint/17864/1/ID%2017864.pdf |