Cell division is a fundamental biological process: faithful chromosome segregation is important to maintain genome stability. The first meiotic division is a unique type of chromosome segregation for two main reasons. First, it segregates homologous chromosome pairs rather than sister chromatids, as it occurs in mitosis. Second, the chromosomes are segregated only when the meiotic spindle has been positioned at the cortex of the oocyte. This division is extremely asymmetric to preserve the stored nutrients for the early embryo. Errors in segregation of chromosomes during meiotic divisions can result in the generation of aneuploid embryos such as Down syndrome. As in mitosis, chromosome missegregation during meiotic division is prevented by the spindle assembly checkpoint that monitors correct attachment to microtubules until chromosomes are bioriented. However, the spatio-temporal coordination between chromosome segregation and spindle positioning is poorly understood. The aim of my project, in Dr. Ellenberg’s group, is to characterize cellular and molecular mechanisms that coordinate accurate chromosome segregation with spindle relocation. First, I will characterize the functional dynamics of chromosome segregation in coordination with the spindle relocation by real time imaging in live mouse oocytes. Second, I will use these imaging assays to investigate its mechanism by perturbation of candidate gene function as well as interfering with cellular components with small molecule inhibitors. Dr. Ellenberg’s group is part of EMBL, a dynamic and stimulating international institute, which offers great potential for interdisciplinary collaborations and training. In this project, I will be able to use my skills concerning mouse oocytes, and at the same time, acquire new expertise in advanced imaging and computerized image processing. I deem this a unique opportunity to address key questions of mouse oocyte research and to further broaden my career as a scientist.