need some help

i've been told that male plants mature way faster than females...don't really know if thats true or not but anyways are there any ways to tell the sex before flowering??

thanks man i've never saw that about the seeds that could come in handy...anyways i started 12/12 lights two days ago after a little more than 2 months of veg how long until they should start showing either male or female parts?? i'm sure i didn't need to say it buy yeah this is my first time haha...