how many clones in one pot

how many female clones can I have in just one pot? from some pics I've seen it looks like they have 2 plants together or will it hurt them?
any info will help

One per pot plain and simple... Then if ones a runt or male ur not killing two plants trying to pull up just one cause the roots will tangle and they will be competing for nutes as well. One

you can put as many as you want, but it is good if they are separatly.