Yes. My thought was he was born with undescended testicles and a micro penis, mistaken for a female vulva. It is called Cryptoorchidism.

Or, Brittney may be a 'blended/merged twin'. That is when a women is pregnant with two separately fertilized eggs that may be of two different sexes and during the gestation, one developing embryo 'absorbs' the other embryo and the women gives birth to one baby with two sets of DNA and two sets of sex instructions that are controlling the body.