Erratum to: Arch Gynecol Obstet DOI 10.1007/s00404-013-3102-7

Unfortunately, the authors’ first and family name has been interchanged for all the authors in the published article. The correct names are given below.

Urszula Kasprzykowska, Joanna Elias, Marek Elias, Beata Mączyńska and Beata Magdalena Sobieszczańska