我们这里小学一年级春季都有孵鸡蛋的一项内容。老人没事可以试试，这里有步骤

https://www.qcsupply.com/blog/product-tips-and-how-tos/simple-methods-to-identify-fertilized-from-unfertilized-chicken-eggs.html#:~:text=Today%2C%20bright%20lights%20are%20used,tale%20sign%20of%20embryo%20development.&text=An%20unfertilized%20egg%20will%20show,the%20level%20of%20embryo%20development.