Does the IV have to be inside u the entire time u give birth ?

Sorry this is my first pregnancy and im so scared of birth to be honest..😖😭😕im cringing so much about the IV needle in ur arm ???? The entire time? And doesnt it hurt so bad ?the pain in you? When do u take out the needle????? Like what...😫😫😫😰😰😥😥🤯🥺