Reproductive Performance of Australian Brahman Experiencing Subfertility in Ang Thong Province

Abstract

Reproductive performance of Australian Brahman under Thai small farm production system was evaluated during the years 1990 to 1993 in Ang Thong province. In 1991 one thousand and four hundred breeding females of Brahman commercial grade were imported from Australia under the provincial livestock development project. An average of 1.73 heads per family and 810 households from 8 districts were involved in this project. After 2 years of rearing the calving average was 86.25% whereas repeat breeder and anestrus rate averages were 6.25% and 5.84%, respectively. The incidences of imperforated cervix, endometritis, uterine atony, ovarian aplasia, ovarian dyatrophy, cystic ovary, cystic corpus luteum, imperforated hymen, segmental aplasia of uterus, vulvo-vaginitis of 70 subfertile females were 5.71%, 1.42%, 5.71%, 2.00%, 2.85%, 1.42% and 22.85%, accordingly.