Looks pretty good.
if their from seed then not a whole lot you can do to them at this stage of growth without perhaps causing a shift in sex.
the larger one in the blue container looks lovely.
if you have the room, I'd wait till another full set of growth starts, top it if you want....but by the looks of your plants you'll know the sex around the 4-6th week anyway...then you top it, clone it. by the time you have a small amount roots on the cutting, your seed plant will have recoverd and she can be sent off to bloom.
but thats just me....

I've always had a problem with what you have right now since I shifted from pumps, and noise to soilless mix. my soilless mix seemed to cause this often.
my noise pumping, water pushing machines that I used to use never had this issue.
the only thing that i've done to combat this is to add epsom salt with watering, and raise the ph alittle. Everytime it's worked. other times I didn't have to do anything at all. But where i used to live, they were having water issue's in the neiborhod(sp?).