Ethical approval
The study of infertile women was approved by the National Medical Ethics Committee at the Ministry of Health of the Republic of Slovenia (No. 0120-174/2018/6) and was conducted following the WMA Declaration of Helsinki. The retrospective analysis of anonymous entries of fertile women from NPIS was exempt from approval by the ethical committee by the Slovenian law (Personal Data Protection Act; Article 17). The Slovenian National Institute of Public Health as the data controller and the Division of Obstetrics and Gynecology of the University Medical Centre Ljubljana as the data processor signed the contract on NPIS data transmission according to the Personal Data Protection Act, Article 11, every five years. The last contract was signed on 25th July 2019.
The authors received no funding.