can you tell the sex of a plant before you flower it

??? i posted a few pics on a diff thread can u tell the sex before
u flower

Yers you can pre flowers. They appear at about 30 days at the 5th to 6th node

you could put it into 12/12 then when you see the hairs thow it back into veg
some beleave that this will cause it to herm,, ithas never happen to me and thats the way i do it

or you could take a clone from each and label them then put in 12/12 this is the perfered way

node? whats that

This is a picture of a node, sorry its so big. but it allso shows male/female.

thanks guys i think the pics will help alot !1!!!!