 The array of medically indicated surgeries differs between trans women (male to female) and trans men (female to male).For trans women, genital reconstruction usually involves the surgical construction of a vagina, by means of penile inversion or the sigmoid colon neovagina technique; or, more recently, non-penile inversion techniques that make use of scrotal tissue to construct the vaginal canal.For trans men, genital reconstruction may involve construction of a penis through either phalloplasty or metoidioplasty.