Most hens can become impregnated within the first week of the breeding phase. After the breeding of the hens it will usually take several days for her to lay her eggs. Most of the time you hear about the second gobbling peak with this talking place it's usually gobblers trying to find the last of the hens that need breeding. Most of the time all this will take place within about 4 week period. I think once she become impregnated it's pretty much over for that hen , to start the next cycle, building herself up with feeding etc and laying her eggs..just my opinion.