That's just where his head is at.  Not far for him to drop now!!!!!!!

They measure the babies postistion in relation to the peliv opening (which is sit right at the opening of the cervix.  0 station means the babies head is ingaged and at the pelvic opening.  +1 means that the head ispassing thru the opening.  -1 means that is is just above the pelvic opening in the uterus.  And the higher up(away from the pelvic opening into the uterus the higher the numer -3/5.  Hope that makes sense.