Interactions between long interpregnancy interval and advanced maternal age on neonatal outcomes.

"Declarations Conflict of interestNo financial or non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article. Ethical approvalThe protocol of this historical cohort study has been reviewed and approved by the Medical Ethics Committee of the Affiliated Hospital of Southwest Medical University (No. KY2021264). As the data were collected anonymously, the informed consents were not required to sign by patients. Conflict of interest No financial or non-financial benefits have been received or will be received from any party related directly or indirectly to the subject of this article."

"Funding Funding for this project was provided by the Sichuan Science and Technology Program, grant No. 2019YJ0696 and the Science and Technology Strategic Cooperation Programs of Luzhou Municipal People’s Government and Southwest Medical University, Grant No. 2021LZXNYD-J21 to Xiaoping Lei. The funding body had no role in the design of the study and collection, analysis, and interpretation of data and in writing the manuscript."