Frontiers in veterinary science · 2026
Individual periovulatory ovarian responses associated with pregnancy outcome following an Ovsynch protocol in Peranakan Ongole cows.
СтатьяНазвание и аннотация: Перевод в очереди
Обработка статьи · этапы, ошибки и управление
Загрузка состояния…
Ошибки и ограничения
История · было → стало
Состояние обновляется каждые 5 секунд, пока блок открыт. Процент показывается только там, где известен объём работы. Пауза останавливает продолжение этапа; текущий запрос к источнику может завершиться.
Hayanti Sari Yanti, Imron Muhammad, Santoso Santoso, Adigunawan Ahmad, Anwar Rahma Isartina, Cristóvão Adelaide José Pereira, Setiadi Mohamad Agus, Herdis Herdis, Purwantara Bambang, Ulum Mokhamad Fakhrul, Amrozi Amrozi
Аннотация
INTRODUCTION: Although ovulation synchronization protocols effectively control the timing of ovulation, pregnancy success remains highly variable among individual cows. The periovulatory ovarian responses associated with subsequent pregnancy outcome following synchronization remain poorly characterized in Bos indicus beef cattle. Therefore, this exploratory longitudinal study characterized individual ovarian sonographic and hormonal responses during an Ovsynch synchronization protocol and evaluated associations with pregnancy outcome in Peranakan Ongole cows.
METHODS: Ten multiparous Peranakan Ongole cows without apparent reproductive abnormalities and body condition scores of 2.5-3.0 (5-point scale) were synchronized using a single Ovsynch protocol. Ovarian sonographic characteristics and circulating estradiol and progesterone concentrations were evaluated throughout the periovulatory period, and pregnancy was determined by ultrasonography.
RESULTS: Nine of the ten cows ovulated following the synchronization protocol, and pregnancy was confirmed in four cows. Most post-ovulatory ovarian and hormonal variables showed weak associations at the 72-h post-ovulatory assessment. Baseline ovarian characteristics showed no detectable associations with post-ovulatory responses, whereas pre- and post-ovulatory estradiol concentrations remained positively associated. Among the post-ovulatory variables evaluated, corpus hemorrhagicum diameter showed the strongest nominal association with pregnancy outcome. Combining corpus hemorrhagicum diameter with largest follicle diameter or corpus hemorrhagicum echogenicity also showed nominal associations.
CONCLUSION: These preliminary findings suggest that early post-ovulatory ovarian characteristics, particularly corpus hemorrhagicum development, may be relevant to pregnancy outcome following synchronization.
METHODS: Ten multiparous Peranakan Ongole cows without apparent reproductive abnormalities and body condition scores of 2.5-3.0 (5-point scale) were synchronized using a single Ovsynch protocol. Ovarian sonographic characteristics and circulating estradiol and progesterone concentrations were evaluated throughout the periovulatory period, and pregnancy was determined by ultrasonography.
RESULTS: Nine of the ten cows ovulated following the synchronization protocol, and pregnancy was confirmed in four cows. Most post-ovulatory ovarian and hormonal variables showed weak associations at the 72-h post-ovulatory assessment. Baseline ovarian characteristics showed no detectable associations with post-ovulatory responses, whereas pre- and post-ovulatory estradiol concentrations remained positively associated. Among the post-ovulatory variables evaluated, corpus hemorrhagicum diameter showed the strongest nominal association with pregnancy outcome. Combining corpus hemorrhagicum diameter with largest follicle diameter or corpus hemorrhagicum echogenicity also showed nominal associations.
CONCLUSION: These preliminary findings suggest that early post-ovulatory ovarian characteristics, particularly corpus hemorrhagicum development, may be relevant to pregnancy outcome following synchronization.