18/6 light cycle till flowering which will change to 12/12 and ussualy within about 10 days you can tell the sex, by little white hairs which are females or balls which are male, are you only using 1 cfl for both of those plants?
It's really hard to tell from the pics.If you get a closer and clearer shot maybe someone could help. Or you can "trick" the plant into showing you by doing as slyfly said or thy this method.https://www.rollitup.org/2394711-post17.html
theres more than one in there ? looking a little tired...
i would suggest going 12/12 now also ... especially if thats your only light
pics are bad ... so no help there