Out of original article and case report published in Obstet Gynecol Sci from January to March 2018, 2 articles, “Algeri Paola, Nicoli Elena, Rota Sonia Maria, Caruso Orlando, Manfredini Cinzia, Buzzi Antonella. A secondary abdominal pregnancy with unusual placental implantation in the fallopian tube: a diagnostic challenge. Obstet Gynecol Sci 2018;61(1):154-160. https://doi.org/10.5468/ogs.2018.61.1.154” and “Algeri Paola, Rota Sonia Maria, Carlini Laura, Nicoli Elena, Caruso Orlando, Motta Teresio. A rare melanoma feature with primary ovarian origin: a case report and the literature review. Obstet Gynecol Sci 2018;61(2):282-285. https://doi.org/10.5468/ogs.2018.61.2.282,” the author names were published incorrectly. The authors apologize for any inconvenience that it may have caused.