If there is a hermi in the grow room then you may has well let the plants run there true course.Little will be gained by cutting the plants down a week early.Just cut them down at the end of there time and take out the seeds save them for future use.You are far better of with a true female then one that has been taken from a femanised plant.I think that femanised seeds are a good thing but i think that the seeds always have a male trait somewhere along the way.If you are a uk grower theen it could be down to the weather that we have just had temps have been realy low at night so if the weather is cold where you are it may be worth puttnt the heating on while the lights are off at night...........................................tyke................................................................