We, the Editor and Publisher of Gynecological Endocrinology, have retracted the following article:
Mohamed Rezk, Haitham Hamza & El-Sayed El-Shamy (2019) Luteal support with vaginal dydrogesterone increases pregnancy rate in patients with clomifene resistant polycystic ovary syndrome receiving letrozole for ovulation induction, Gynecological Endocrinology, 35(3), 217–219, DOI: 10.1080/09513590.2018.1512571.
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 have not responded to the concerns raised, and they have not provided their original data or sufficient supporting information to verify that the research and publication comply with the journal’s Editorial Policies. As verifying the validity of published work is core to the integrity of the scholarly record, we are therefore retracting the article, and have informed the authors.
We have been informed in our decision-making by our Editorial Policies and COPE guidelines.
The retracted article will remain online to maintain the scholarly record, but it will be digitally watermarked on each page as ‘Retracted’.