Time frame for female plant to grow seeds?

Is there a time when a female becomes unable to produce seeds? For instance if I was almost done with a flower cycle. Say four weeks left. And I notice one of the females has become a hermi. I did not notice right away and it started to produce pollen. I am only a few weeks away from harvest would that pollen hurt the other plants? Should I chop down what I got or are the females past the part of reproduction? I dont see any seed growth at all but I am not sure and need some guidance. Thanx

Four weeks may be enough time to grow viable seeds. I've heard it takes up to 6 weeks but as little as 3. If the pistils are still white she can get pregnant. The pistils turn color sooner than they normally would if they get fertilized. I painted a site about a week ago and its already swollen with more seeds than I can count.