Hey, ill say first im not a pro grower but it looks like your plants in abo0ut the same stage as mine. it looks like it is in its preflowering stage and is developing what they call undifferentiated primordia( should be forming somewhere around the calyx) which is essencially where your male pollen balls or female pistils will form. with all the reasearch i did you really cant be 100% untill buddin. hope i could help