The Congress of the European Society of Human Reproduction and Embryology (ESHRE) is the most important European event in reproductive medicine; its 39th edition this year took place in the Danish capital from June 25th to 28th.

For this 39th edition, ESHRE selected 18 works from the Eugin Group. Among them, there were a total of 7 oral presentations and 11 posters showcasing different research projects in the pioneering fields of assisted reproduction and fertility.

We had 7 oral presentations:

• Andreu Quintana Vehi: Paternal body mass index affects early embryo development but does not impact clinical outcomes: a timelapse study of 7,656 embryos in oocyte donation cycles. (Eugin and CIRH)
• Irene Miguel-Escalada: Oocyte donation does not increase live birth rates in young women suffering from recurrent pregnancy loss. (Eugin and CIRH)
• Marco Petrolo: Poor semen parameters alter embryo morphokinetic patterns during preimplantation development but do not compromise clinical outcomes. (Eugin)
• Nuria Correa: A clinically robust machine learning model for selecting the first FSH dose during controlled ovarian hyperstimulation: incorporating clinical knowledge into the learning process. (Eugin and UAB)
• Sara Pietroforte: Poor mitochondrial metabolism impairs meiosis and contributes to reduced oocyte maturation rates in patients with advanced maternal age. (Eugin, Boston IVF, UAB, and Optiva Fertility)
• Diana Turchi: Paternal age is associated with mitochondrial vulnerability to sperm cryopreservation. (Biogenesi)
• Demián Glujovsky: Personalized embryo transfers guided by transcriptomic endometrial receptivity analysis (ERA) in infertile patients: a systematic review and meta-analysis (CIRH, Hospital Italiano de Buenos Aires, and Argentine Cochrane Centre)

Here are the 11 academic posters presenting the results of various research projects conducted by the teams from Eugin, CIRH, and the R&D department in collaboration with other centers and universities:

• Anna Blázquez: Prolonging the time of vaginal progesterone supplementation does not improve pregnancy outcomes after day 6 blastocyst transfer. (Eugin)
• Marc Torra-Massana: Oocyte vitrification does not impair clinical outcomes in women of advanced maternal age. An analysis of 1268 cycles using fresh and vitrified oocytes. (Eugin and CIRH)
• Juanjo Fraire Zamora: No difference in morphokinetic patterns between male and female preimplantation embryos. (Eugin)
• Stella Galatidou: Single-cell proteomic analysis of human oocytes reveals a decreased abundance of meiosis and proteostasis regulators with advanced maternal age (Eugin, CIRH, and Northeastern University of Boston)
• Montserrat Barragán: Sperm mitochondrial DNA copy number and mitochondrial function in normozoospermic men may predict fertilization rates after intracytoplasmic sperm injection. (Eugin, CIRH, Institute for Research in Biomedicine (IRB Barcelona), and Democritus University Of Thrace in Greece)
• Mina Popovic: Reporting chromosomal mosaicism reduces the overall accuracy of preimplantation genetic testing for aneuploidies: results from the extended in vitro culture of 230 human embryos. (Eugin, CIRH, CEGYR, Instituto Bernabeu, Unidad de la Mujer del Hospital Ruber Internacional, Unidad Reproducción Asistida del Hospital QuironSalud Barcelona, Unidad Reproducción Asistida del Hospital QuironSalud Zaragoza, Ghent University Hospital de Bélgica)
• Aïda Pujol: Relationship between days of male sexual abstinence on the day of oocyte retrieval and clinical outcomes. (CIRH)
• Ana Maria Sanchez: Endometriosis is negatively associated with morphokinetic indicators of embryo developmental competence. (Eugin Milano, Casa di Cura La Madonnina, Biogenesi Reproductive Medicine Center, Istituti Clinici Zucchi de Monza y Department of Medical Physics de Monza)
• Jose Buratini: Neuregulin 1 supplementation and sequential stimulation improve post-IVM embryo production. (Institute of Biosciences de Sao Paulo)
• Renata Erberelli: In vitro time to maturation of Metaphase I oocytes: a time-lapse study correlating blastocyst formation and ploidy status. (Huntington Medicina Reprodutiva y Embryology Department de Sao Paulo)
• Gabriela Gonçalves: What is the influence of blastocyst hatching position on clinical pregnancy rates? (Huntington Medicina Reprodutiva)

Our most sincere congratulations to all the authors and the teams involved for the work done!