Dystocia (egg-binding) is when a female cannot pass her eggs — a life-threatening emergency signalled by a gravid female straining without laying, going off food, and becoming lethargic.
It can happen with or without a male (females can produce infertile eggs). Provide a proper lay site, but if she strains for too long or looks unwell, it's an urgent vet visit — never try to remove eggs yourself.