Sex assigned at birth:

It is sex that is assigned to the person who has just been born, usually as male or female, based on the appearance of the external genitalia.

Sex reassignment:

It is a term that refers to surgical procedures by which the sexual characteristics of a person's birth so that they become as gender with which the patient is identified change.

Sexual orientation:

The ability of each person to feel a deep emotional and sexual attraction to individuals of a different gender or the same gender, or more than one genre, as well as the ability to maintain intimate and sexual relations with these people.