Not necessarily. A lot of women do show a bit earlier but not always. I have twins so 3rd baby (I think, not had scan yet lol) but 2nd pregnancy to get this far. I started showing at 22 weeks with my twins and I am currently 10+4 and no sign of starting to show yet, not had bloating. Seen other ladies show very early with their 1st because of bloating and other ladies not show until past 12 weeks after already having children. Cannot really predict.