"Chicken embryo eggs" is also known as "happy eggs", "prosperous eggs". In some areas of the south used as nutritional tonic food. Folk believe that: chicken embryo eggs have the effect of tonic gas, eating can make the color of the face, libido increase, strong body, delay ribbon aging. Fresh chicken embryo egg protein content is high, this is because the egg in the incubation period, not only has not been damaged, but also by the incubation has been enhanced. In addition, it contains "human placenta" of certain components, improve gastrointestinal function, appetite and anti-aging effect.　　However, most of the chicken embryo eggs sold in the market are eggs used for hatching chicks, and they are chicken embryo eggs that have died in the egg shell due to improper temperature, humidity, or infection with germs that have halted their development. This kind of dead embryonic eggs originally contain protein, fat, sugar, inorganic salts and vitamins and other nutrients have all or part of the change, the vast majority of the embryo has been utilized and consumed, the remaining nutrients are very little.　　Most of the chicken embryo eggs sold on the market are stillborn eggs during incubation, which are most susceptible to contamination by salmonella bacteria and molds, and it has been determined that almost 100% of the dead embryo eggs contain germs. Consumption of this not fresh dead embryonic eggs not only nutritional value is not high, and easy to occur poisoning, often nausea, vomiting, causing dysentery, typhoid fever, hepatitis and other diseases. Dead chicken embryo eggs also contain steroid-like substances, will promote the elderly blood pressure, its hormone composition will lead to children's precocious puberty. Therefore, the bottom of the nutritional value of hatching eggs, and easy to be contaminated by germs, if the heating is not thorough, uncooked, it is easy to food poisoning.　　Therefore, it is good to eat less chicken embryo eggs from a health point of view.