If a hen is truly broody she could hatch the fertile eggs for you..... or if hen has been broody for a couple weeks they might accept day old chicksI just lost my rooster and my hens have just started laying. I haven't found another RIR rooster and have read that the hens carry the sperm for 3 to 4 weeks. I was thinking about getting a small incubator and hatch some eggs. I was wondering about they hens accepting the chicks after they are hatched and introduced to the flock. My hens are not broody and after reading what you've said I'm re-thinking that!
But if no hen is broody by the time the eggs hatch in the incubator you will have to raise the chicks in a brooder and integrate them into the flock when they are big enough.