I always sex my plants. No use contaminating a pretty girl with seeds.
Heres a short guide.
Use some cloning gel, rock wool, new razor blade and a GLASS pie dish.
Cut the clones at a 45 degree angle with a NEW razor blade, just above a joint.
The clone doesnt need to be too long. About three inches in stem length. It does need to only have a few leaves on it though. Cut excess leaves off w/ razor (I usually leave the top leaves).
Dip the FRESH cut clone into the cloning gel (follow directions on bottle!!!) and put it in a wet rockwool piece. DONT FORGET TO LABEL!
Place the rockwool squares w/ the plants into a pie dish.
Put water in the pie dish. You should only need about 1/8" in the bottom.
Put the new babies in the dark for 24 hours.
Then set them into bloom by giving them light for 12 hours, then dark 12 hours.
You will know the females as they will spout white hairs after a while.
If you want to keep the female clones alive...
Dont let the pie pan run dry! Roots need to be moist to live.
Change the light cycle for grow.
Wait.
Its awful tempting to pull out the stem to see if it has roots. All I can say is DONT. Let them grow until you can see the roots or they are dead.
Then put them into your growing medium and GROW!
I would research it a bit more and pay attention to what you are doing, you could have your next fems sprouting roots!
OH! And keep a journal!