Hashim, Z.H. et al. 2022. Relation of serum and follicular level of GDF9 to oocyte quality, embryo quality, and pregnancy rate. Iraqi Journal of Embryos and Infertility Researches. 12, 1 (Jun. 2022), 94–108. DOI:https://doi.org/10.28969/IJEIR.v12.i1.r8.22.