developmental stage egg stage FBdv:00005286 The stage of the Drosophila life-cycle from maturation of an egg to the end of fertilization. At the beginning of this stage, the nucleus is arrested in meiotic metaphase I. The completion of meiosis and the start of protein synthesis are triggered by ovulation. If the female has already mated, fertilization begins during meiosis. Temporal ordering number - 10290. FlyBase_development_CV