It turns out they lay an egg a day till they have a clutch of about a dozen eggs that they then sit on. If the eggs are taken away, they keep laying.
Some further facts & a question:
* Some hens are bred to have a very long laying season.
* They need about 14 hours of daylight to lay consistently.
* Burmese python eggs are twice the size of chicken eggs.
* Two birds—the hooded pitohui and the ifrita kowaldi, both of Papua, New Guinea—str poisonous & it's possible that their eggs are as well.
* Do all eggs taste pretty much the same or are some disgusting?