Diaper
A wind egg is a bird egg that is laid without a lime shell and is therefore only surrounded by the thin shell skin . The name is derived from the Latin ova subventanea ( ova - 'eggs'; ventus - 'wind'). It was thought that these eggs had been fertilized by the wind or the breath of a god.
The phenomenon is common in laying hens . As a rule, a more frequent appearance of greyhound eggs indicates a lack of calcium and can be remedied by giving broken mussel shells . Calcium absorption can be improved by adding a vitamin D preparation . Mostly bindweed occurs in older chickens and in high summer temperatures. Then food intake is restricted and a lack of calcium becomes noticeable particularly quickly.
In rare cases, the fallopian tubes may also be infected with a virus , but the general condition of the chickens is also reduced.
Phrase
A thing that is not fully developed, only half-finished, can metaphorically be called a wind egg . The phrase "hatching a diaper" means: doing a useless job, making unrealistic plans.
