I'm going to be the voice of dissention here. I think the bird is a cockerel, but some better pics would help confirm. I'm seeing darker shading on the wings, which is a male characteristic, and I'm pretty sure that's a triple row on the pea comb. A profile shot of the bird, from the side showing the entire body would be good, as would a clear straight on comb shot.
Looks like a lovely 17 week old, point of lay pullet. Her comb is still flat, but should start to develop more over the next few weeks. The fact that there are no male saddle feathers by this time is also a good indication of pullet.