Slow to show sex - close to 3 weeks

Started with six plants. Three went dude and two turned into beautiful young ladies. The other shows signs of nothing. We are approaching three weeks of 12/12 and while two are flowering according to standards, I have zero clue about the third. All I can say is that the unknown is getting huge.

I'm banking on seeing something shortly and most likely a girl, but strange since its the same strain and has the exact same birthday as the others.

What do you think?

Thanks and appreciate the knowledge

More than likely it's a good sign of being a female, as females develop slower than men. That being said I have seen slow males too so it's a wait and see game. Good luck