If your baby was born early, do they go through leaps more in time with their due date, before or after? My baby was born 9 days early and the way she's been acting the last 2 days I'm convinced she's going through leap 3, which according to wonderweeks shouldn't start for another 10 days, however she is 11 1/2 weeks old today which is when the leap is supposed to start. Anyone else think your baby goes through leaps based on when they were born and not their due date?