Nothing in the pics indicates sex. There are 2 stages of growth: Veg and Flower. You can find out the sex of the plants by putting them on 12/12 light-regiment for about 2 wks. I assume ya have a timer...(?) Feed LIGHTLY (1/4 strength) a high Nitrogen fertilizer durning veg. Switch to Bloom fertilizer a few weeks after the females show sex. Get rid of all males. Note* - you MUST provide ambient light in the correct spectrum. CFL's work all-right but imo, HID-Lamps are the best for entire growth, seedlings - finished buds. The KEY is to provide at Least 50w/sq.ft (try to go for up to 100). One all these things fall into place, you will be on "autopilot", and your grow will thrive. Peace