Funding for this research was provided by:
Modern Agro-industry Technology Research System ((CARS-36))
The Program for Changjiang Scholar and Innovation Research Team in University ((IRT_15R62))
Received: 8 July 2019
Accepted: 26 November 2019
First Online: 18 February 2020
: This study protocols for the collection of bovine ovaries from experimental animals were reviewed and approved by the institutional animal care and use committee of China Agricultural University Beijing, China (permit number: DK996).
: The authors declare that they have no competing interests.