hi there,i think it all depends on the person i'm 12 weeks with my 5th baby and im already showing,with my first i didn't show till around 19 weeks with my second it was around week 17 with my 3rd i was around14 weeks my 4th around 11 weeks and with this one i ballooned out pretty much instantly. the midwife said it was cos my body knows what its doing (it should by now) so it happens earlier and u do retain more water.i thik it depends on your size and shape,soucouldwellbe getting your bump early xx