Jabbar, D.K. 2026. Leukemia Inhibitory Factor (LIF) and LIF Receptor (LIFR) Gene Polymorphisms and Implantation and Pregnancy Outcomes After Assisted Reproduction: A Systematic Review and Meta-Analysis. Journal of Integral Sciences. 9, 2 (Oct. 2026), 114-130. DOI:https://doi.org/10.37022/jis.v9i2.160.