When examining the lung fields of a normal CXR, the outline (silhouette) of the heart borders; the ascending and descending aorta; the aortic knuckle and the hemidiaphragms should be clearly visible. 1  All of these silhouettes, or structures, are in contact with a specific portion of the lung.
Perhaps the most important parameter is temperature â chicken eggs should be incubated at a temperature between 99 and 102 degrees Fahrenheit (99.5 is often considered to be ideal) and 50 to 65 percent relative humidity (60 percent is often considered the ideal).uring the final three days of incubation, the eggs should ideally be located in a slightly cooler (98.5 degrees) and more humid (65 percent relative humidity or greater) environment to facilitate successful hatching.
Egg Incubation times and temperature for chickens, quail, turkeys, and other poultry. The generally accepted temperature for incubating almost all birds eggs is between 99.5 and 100.0 degrees F (37.5-37.8 C). Slight variations around this temperature range is alright, but varying more than a degree up or down for extended periods of time can have an impact on your hatch rate, cause birth defects and even cause the eggs not to hatch.