Also see: SON and BABY
DAUGHTER: This sign is a combination of GIRL and BABY. Form your right hand into a "flat hand (looks like a "B-hand" or a Karate-chop hand). Touch the fingertips of your B-hand to the right side of your chin, then move the hand down to the crook of your left forearm.
DAUGHTER: version 1
DAUGHTER: version 2
You can see the "GIRL" + "BABY" origins of this sign.
Also see: SON