Follicular Size Threshold for Ovulation Reassessed. Insights from Multiple Ovulating Dairy Cows.
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
López-Gatius, Fernando https://orcid.org/0000-0002-1413-3862
Llobera-Balcells, Mònica
Palacín-Chauri, Roger J
Garcia-Ispierto, Irina https://orcid.org/0000-0001-6404-1248
Hunter, Ronald HF
Abstract
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.
Description
Keywords
bovine, follicular size, ovulation failure, pregnancy rate, twins
Journal Title
Animals (Basel)
Conference Name
Journal ISSN
2076-2615
2076-2615
2076-2615
Volume Title
12
Publisher
MDPI AG