@brinuh, I went into labor with my son 2 days before mine.... However that would've been 42 weeks since I last ever saw his other DNA. And @rociob no. They go by your last menstrual cycle and then adjust by baby size. Both my boy pregnancies are 2 weeks off.
but don't they usually go by the due date..& go back 38 weeks from it. to figure out when the baby was conceived
Mine was WAY off when I had my first son..... I know the exact day I got pregnant and the doctors insisted it was 2 weeks later. Same with this baby boy. My daughter was pretty spot on
My due date never changed during my Pregnacy