What is wrong with a queen ant if her eggs don't hatch?

There are two possibilities I can think of. It's possible that the temperature is too low for the eggs too 'hatch' and that the queen and the eggs are in 'hibernation mode'. Increasing the temperature might help in this respect. read more

Be aware that ant eggs don’t hatch in the usual sense of the word. They turn into larvae, which is a worm-like development stage. They do not immediately emerge as adult workers. The whole life cycle from egg to adult takes at least a month in most cases. read more

With larger species like camponotus (carpenter ants) it can take anywhere from one month to three months. Also, ant eggs don't just hatch into adult ants. Ants go through complete metamorphosis which means that they have an egg stage, a larvae stage, and a pupae stage. Thanks for reading! I hope my answer helped. read more