Question: How do chickens lay eggs without a rooster around?
They just let them drop.
Hens will lay until they can't anymore. Rooster or no. It's a biological process. You don't need a rooster for eggs, just to have fertilized eggs for the next generation.
Because they’re female? Human females have eggs that drop right regular like, with or without a feller around. :)
I'm not a chicken, but as I understand it, hens go through a daily menstrual cycle. (technically not a "menstrual" cycle) If their egg has not been fertilized by a rooster, it will just flush out of their system, with a shell attached.