It's growing. I don't have much experience but that looks like more growth. how old are they? when they flower you'll know if it's a girl. if it has balls you'll ask everyone out of desperation and hope that your worst fears won't be confirmed. ( at least i did)
View attachment 1152976this is a dude with balls- he sucks and is now deceased. On the other hand this is a chick
View attachment 1152975 still living and going strong. i went away for a week, feed em, switched to 12/12 and hoped for the best-got it too f#ck yea! i think you gotta hold a bit- good luck!