i didn't know. i just don't want to waste the space and the time and nutes and everything on something i am going to kill.
Considering 40% of your seedlings will be male, that philosophy does not compute. You must allow the plant to develop as if it is female until it shows you it is a male.
but if it stresses it that much i probably won't do it. since i will be taking clones i don't want the dna of the clone to have stress or at least as little stress as possible. i hear the stress carries over in the dna? not sure if that true, but it makes sense kinda.
Give them time to develop. If you want to take clones, you want to take it from a vigorous plant, not a runt.
Males show sex first. Take your clones after that.
If time is a factor, go with a strain known for speedy harvests, like a Lowryder deriviative strain (cloning auto-flower strains is highly impractical). You will trade yield for speed, but they produce good smoke.
Good luck!