Nguyen, T. T., Doan, H. T., & Quan, L. H. (2018). The spindle of oocytes observed by polarized light microscope can predict embryo quality. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 8(1), 131–134. https://doi.org/10.18203/2320-1770.ijrcog20185408