The study was conducted on beef cattle at households in Cho Gao district, Tien Giang province by investigating 396 cows of 111 households to determine the reproductive disease situation using clinical diagnosis and ultrasound technic to identify some common ovarian diseases that cause delayed reproduction. It was shown that the conception rate in cows was 74.0% with the average mating coefficient of 1.35. The percentage of reproductive diseases in cows was 35.6% and the percentage of cows with delayed reproduction was 27.3%. Ovarian diseases of cows were identified by three forms including underdeveloped ovaries (31.8%), cysts (31.8%), and corpus luteum (36.4%). Differences in frequencies in the breed group and disorders were also identified with the highest proportion being Brahman breed (37.4%) and the predominant disorder being calving difficulty (37.4%).

Keywords: Beef cattle, ovarian disorders, reproductive diseases.