Well, it is still hard to tell, but I'm still thinking male. It could be a male with a small pea comb. Some lines are like that. Very slow to develop. In these pics, maybe it's just the lighting, but even one of the blues has darker looking feathers on it's back and wings that makes me wonder if it might possibly be male(the one near your pink sandal in the pic). Tail doesn't look too female on it either. Blue males will start putting in darker feathering on their backs (saddle area) and wings and that forms their black cape. You say they are about 14 wks old, so at that age, if they are male, they should be starting to grow in their saddle and hackle feathers. These will have narrow pointy like ends instead of the rounded feather end like a female. So, pick those birds up and start parting feathers on their back towards the tail area. That's where you would find saddle feathers starting to grow in.