Eggs should be turned several times a day during incubation to ensure that the developing embryo has access to an adequate supply of oxygen and to prevent the yolk from settling in one place. The recommended frequency of turning can vary depending on the type of egg and the incubator being used, but most experts recommend turning eggs at least 3 to 4 times a day.
Some incubators have automatic turning mechanisms that rotate the eggs on a regular schedule, while others require manual turning. If you are turning the eggs manually, it’s important to be gentle and to avoid handling the eggs too much, as rough handling can cause damage to the developing embryo.
It’s also important to keep track of which end of the egg is facing up, as the position of the egg can impact its development. Some incubators have trays that are marked with a “top” and “bottom” side to help ensure that the eggs are returned to the correct position after each turning.
In general, it’s best to follow the manufacturer’s guidelines for egg turning or consult with a specialist in egg incubation to ensure that you are turning your eggs correctly and often enough for optimal hatch rates.