Association of Fibroblast Growth Factor-1 Promoter Polymorphism and its Serum Concentrations with Repeated Implantation Failure after Fertilisation: A Cross-sectional Study.

Background: Fibroblast growth factors (FGFs) play a key role in embryo implantation and support endometrial trophoblastic interaction.

Aim: The aim of the study was to evaluate the association between FGF-1 (rs34011) gene variety and its serum concentration with repeated implantation failure (RIF).

Setting And Design: The design of the study was a cross-sectional study.