pre-flower topping?

thanks for the feed back... my girls are outdoor and the sunlight is now at 14\10 and I was told the plants are going into flower so I assumed preflower they all show female parts and are beginning to stretch.. my concern was stressing them as they go into flower... but I guess the fact is they are still in veg until the lights 12\12?

flower doesn't need 12/12, that's just the indoor schedule that's much used by many of us
many plants will go into flower before the 12/12 point, but depends on the genetics