Often it is possible to do this with birth control pills as the estrogen supplements. Berkovitz describes the technique. Skin and muscle bundles and accompanying vasculature are brought to an area of the penis to supplement the length. In most cases, there is a small phallus with corporal tissue capable of erection and skin capable of normal sensation. Testosterone injections or patches are given beginning at puberty, although sometimes low doses are administered earlier for social reasons.
Little boys have to learn to pee standing up.
But all too often, appearances cannot mask the upheaval within. Happy endings for XY individuals assigned to femaleness, at least so far, appear to be rare, or at least unreported. Adding to the trauma are the procedures. There was no scientific evidence about what was the right way to do things. Mistakes have been made.