It depends on the hen, but *generally* a hen will molt after hatching her chicks, care and brood the chicks, then pledge them at about 4 to 6 weeks. Somewhere in that time frame, usually about 6 weeks or so, she may begin to lay again.
Some take longer (sometimes 4 months or so) some a little shorter, but usually they stop laying for at least 3 weeks after hatch.
Worst part it's I totally did not expect it and hatched 14 right before it happened. I sold some so now in total I have 21 chickens.. Out of all of the chicks only 2 have been roosters so I can't complain.. My luck 18 chickens will go broody next year.. :/