Your star sign is determined by the position of the sun in relation to the stars at the time of your birth. If you were born in April, your star sign is either Aries or Taurus, depending on the exact date of your birth. A cesarean section (c-section) does not change your birth date or star sign. Therefore, if you were born in April, your star sign is either Aries or Taurus, regardless of whether you were born naturally or via c-section.