For future reference as well... It's most often recommended by a vet to wait at least 1 year or until the snake is of decent size before you have them checked... Or you may injure or cause pain to the snake. I have had Suzi about 9 months, and she is pretty big but I'm still scared to have her checked yet... Since she has grown past the length most males would get, I would say she is female...

A good rule of thumb for the most commonly kept species is that males reach a length of about two feet (60 cm), while females can reach around three feet + (90 cm).