that's definitely a nice female. I just had five straight males-pissed me off. then I made sure that my seedlings had four or five inches of soil beneath them, now I've had three straight females so far. consider that and ph level when you start your next batch. a potential female seedling will need cozy conditions and soil that's not too acidic and pretty deep in order to stay female, otherwise it will think it's in a shitty area and it thinks all it needs to do is form some pollen sacs and release them into the wind to find the female flowers in the nicer areas.