RT info:eu-repo/semantics/article T1 The Infuence of Follicular Fluid Metals on Assisted Reproduction Outcome A1 Rodríguez Díaz, Rubí A1 Blanes Zamora, Raquel A1 Paz Montelongo, Soraya A1 Gómez Rodríguez, Jorge A1 Rodríguez Fiestas, Sonsoles A1 González Weller, Dailos A1 Gutiérrez, Ángel J. A1 Rubio, Carmen A1 Hardisson, Arturo A1 Niebla Canelo, Daniel A1 Vega, Samuel A1 González Dávila, Enrique A2 Obstetricia y GinecologíaPediatría, Medicina Preventiva y Salud Pública, Toxicología y Medicina Legal y Forense y Parasitología K1 Metal K1 Follicular fluid K1 Embryo quality K1 Pregnancy K1 Polycystic ovary syndrome AB Infertility has become more common, with an increased exposure to toxic compounds including heavy metals (HM). Follicular fuid (FF) surrounds the developing oocyte in the ovary and can be analysed to assess metal content. The levels of twenty-twometals were measured in the FF of ninety-three females in a reproduction unit, and their infuence on assisted reproduction technique (ART), were examined. The metals were determined by optical emission spectrophotometry. Low values of copper,zinc, aluminium, and calcium favour polycystic ovary syndrome. The relationships between the number of oocytes and metals: iron (rs=0.303; p=0.003) and calcium (rs=−0.276; p=0.007) are signifcant, as well as between the number of mature oocytes with iron (rs=0.319; p=0.002), calcium (rs=−0.307; p=0.003) and sodium (rs=−0.215; p=0.039) and are near to signifcance in the case of aluminium (rs=−0.198; p=0.057). In the group with a fertilisation rate ≤ 75%, 36% of the women presented calcium >176.62 mg/kg compared to the group with a fertilisation rate ≥ 75% where this percentage was only 10% (p=0.011). An excess of iron and calcium reduces the good quality embryo rate, and an excess of potassium impairs the blastocyst rate. If potassium is above 237.18 mg/kg and calcium is below 147.32 mg/kg, these conditions favour embryo implantation. Pregnancy is infuenced by high potassium and low copper levels. Controlling exposure to toxic elements is recommended for allcouples with reduced fertility or receiving an ART. YR 2023 FD 2023 LK http://riull.ull.es/xmlui/handle/915/34984 UL http://riull.ull.es/xmlui/handle/915/34984 LA DS Repositorio institucional de la Universidad de La Laguna RD 17-may-2024