Topics:
Animal Refresher, Poultry Science
Major Objective of Turning Eggs During Incubation
The major objective of turning the egg during incubation is:
- It prevents the embryo from sticking to the shell membrane — Correct Answer
- It prevents the piped egg condition
- It prevents early embryonic death
- It ensures uniform temperature distribution in the incubator
Explanation:
Correct Answer: It prevents the embryo from sticking to the shell membrane
The primary and major objective of turning eggs during incubation is to prevent the developing embryo from adhering (sticking) to the shell membrane. If the embryo sticks, it cannot develop properly and will die.
Turning Protocol
- Turning is done at 45° vice-versa.
- At least 8 times per day for optimum hatchability.
- Done during the first 18 days only (not the last 3 days in the hatcher).
Consequences of Not Turning
- Embryo sticks to shell membrane → abnormal development → embryo death.
- High early embryonic mortality.
Position of Egg in Incubator
- Setter (days 1–18): Upright position (broad end upward).
- Hatcher (days 19–21): Horizontal position — turning STOPS so the chick can orient itself for pipping (breaking the shell).
Why Other Options Are Wrong
- Prevents piped egg → piped egg failure is due to low moisture, not lack of turning.
- Prevents early embryonic death → early embryonic death is due to temperature extremes.
- Uniform temperature → this is achieved by ventilation fans, not turning.
📚 About this Topic — Animal Refresher
This multiple choice question is from Animal Refresher, Poultry Science. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
