Need closer images. If you don't have a camera with a macro lens or setting, it's going to be tough for anyone to say with certainty at this stage.
I usually dissect a preflower on each plant with a razor as soon as they appear, before the male preflower even starts showing the little stalk on the bottom, which is the normal confirmation.
Hard to describe over the internet but, when dissecting you will notice that a male preflower is "layered" while the early female preflower seems solid.
This is all in regard to early, early, preflowers. As in, you don't want to wait another week to tell just by glancing at it.