Follicular Size Threshold for Ovulation Reassessed. Insights from Multiple Ovulating Dairy Cows.
Palacín-Chauri, Roger J
Hunter, Ronald HF
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López-Gatius, F., Llobera-Balcells, M., Palacín-Chauri, R. J., Garcia-Ispierto, I., & Hunter, R. H. (2022). Follicular Size Threshold for Ovulation Reassessed. Insights from Multiple Ovulating Dairy Cows.. Animals (Basel), 12 (9) https://doi.org/10.3390/ani12091140
In Bos. taurus cattle, follicular deviation to dominance begins when the selected ovulatory follicle reaches a mean diameter of 8.5 mm. The dominant follicle acquires the capacity to ovulate when it reaches a diameter of about 10 mm. In this study, data derived from 148 cows in estrus with one follicle of ovulatory size and another of 7-9 mm, reveal that the small follicle has the capacity to ovulate alone or with the dominant follicle; thus, giving rise to a single or twin pregnancy. This indicates that a follicle of deviation size may ovulate in the presence of a follicle of ovulatory size.
Twins, Pregnancy rate, Bovine, Follicular Size, Ovulation Failure
External DOI: https://doi.org/10.3390/ani12091140
This record's URL: https://www.repository.cam.ac.uk/handle/1810/338106
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/