I've had only females with the seeds I've used so I THINK they're a pretty sure thing....haven't had a male show up yet so for me 100% (so far....)

The penetrator generally isn't used by itself....you mix a small amount of it with your spray such as the Reverse when you spray it on the plants and it helps the plant absorb the solution better (so I am told.....) I use it because I was told to use it with the Reverse and when my hydro guy tells me to do something I do it... I understand that Penetrator is something you add to several different solutions to help the plant absorb things better....that's about all I know about it.

Not sure all this info will be really helpful for you PR as it sounds like you may already have a mother (hopefully) after all your work.....hope it's just veg growth and not hermie probs.