RETRACTED ARTICLE: Effects of the levonorgestrel-releasing intrauterine system versus the copper intrauterine device on uterine artery Doppler indices

Abstract

Statement of Retraction: Effects of the levonorgestrel-releasing intrauterine system versus the copper intrauterine device on uterine artery Doppler indices

We, the Editors and Publisher of the European Journal of Contraception & Reproductive Health Care have retracted the following article:

Rasha E. Khamees, Eman A. Kishk, Sally S. Mahmoud, Mamdouh E. Said & Omima T. Taha (2022) Effects of the levonorgestrel-releasing intrauterine system versus the copper intrauterine device on uterine artery Doppler indices, The European Journal of Contraception & Reproductive Health Care, 27:1, 23-27, DOI: 10.1080/13625187.2021.1991303

Since publication, significant concerns have been raised about the integrity of the data and reported results in the article. When approached for an explanation, the authors were fully cooperative with our investigation and did provide us with their raw data, but they have been unable to adequately address the concerns raised. As verifying the validity of published work is core to the integrity of the scholarly record, we are therefore retracting the article. The corresponding author listed in this publication has been informed.

We have been informed in our decision-making by our policy on publishing ethics and integrity and the COPE guidelines on retractions.

The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as ‘Retracted’.

View retraction statement:

Statement of Retraction: Effects of the levonorgestrel-releasing intrauterine system versus the copper intrauterine device on uterine artery Doppler indices