Embryonic stage is one of the most fundamental and important phase in the life cycle of fishes. Eight stage of egg development were determined for vendace (Coregonus albula L.) in the artificially fertilized spawns. According to our data the first embryonic stage of vendace lasts 4 days, the second stage- 36 days, the third embryonic stage continued approximately 36-52 days, the forth stage - until 76 days from fertilization, the fifth - from 76 up to 105-1 10 days, the sixth stage starts on 105-1 10 day from fertilization and lasts nearly 135-1 42 days, the seventh stage -from 136-1 42 to 157 days, the eights stage starts on the 157 day and ends on the 161 day. All processes are discussed in details, spawn diameter, length of embryo and yolk-sac are also determined. Average length of the newly hatched larva is 9.1 1+0.385mm and length of yolk-sac - 1.21+0.089 mm. Embryonic development depends on climatic factors, spawn quality, on the process of oogenesis and fertilization.