MORN2 regulates the morphology and energy metabolism of mitochondria and is required for male fertility in mice.

"Declarations Ethics approval and consent to participateAll procedures were in accordance with the ethical standards approved by the Animal Use Committee of the School of Medicine, Shandong University, for the care and use of laboratory animals. The research was approved by the Institutional Review Board of Shandong University. (Reference Number: 2019#058). Consent for publicationNot applicable. Competing interestsThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. Competing interests The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper."

"We are grateful to all our colleagues at the Center for Reproductive Medicine, Shandong University, for their technical and spiritual support. This work was supported by grants from the National Key R&D Program of China [2022YFC2702600, 2018YFC1003400]; Research Unit of Gametogenesis and Health of ART-Offspring, Chinese Academy of Medical Sciences [2020RU001]; Academic Promotion Programme of Shandong First Medical University [2019U001]; Major Innovation Projects in Shandong Province [2021ZDSYS16]; Science Foundation for Distinguished Yong Scholars of Shandong [ZR2021JQ27]; Taishan Scholars Program for Young Experts of Shandong Province [tsqn202103192]; Basic Science Center Program of NSFC [31988101]; Shandong Provincial Key Research and Development Program [2020ZLYS02]."