It depends on where it is and the degree of physical variation. If the change is too big, it will definitely have an impact. If the body changes gradually, it may not affect much. I know a sister who has a totem tattooed on her stomach, and the totem is a little deformed when she is pregnant. Another buddy has a wolf's head tattooed on his arm. After going to the gym for body shaping, the whole person is strong and the tattoo on his arm has not changed.