#asktheexperts I have PCOS and irregular periods. I got pregnant, but since my periods are irregular, I don’t remember my last period date. I came to know I was pregnant at around 7 weeks. Based on her calculations, my gynecologist gave my LMP as July 21, 2025. According to my gynecologist, as of today I am 37 weeks pregnant. But when I got scans done, they showed a different gestational age. In my last BPP scan, it showed 33 weeks 5 days — almost a 3-week difference. Now I’m confused about which one I should consider — my doctor’s calculation or the scan results.”