short cycle and pregnancy dates

[bambi06]

does it make any difference to how many weeks you are if your cycle is shorter..i have 24 day cycle and first day of period was 2 nov so am i 6 weeks + or 7 weeks+...anybody any ideas? pleeease

Until you have your scan they will date you as per a 28 day cycle. If the difference is less than a week then they tend to go with the scan dates

Babycentre has a calc that adjusts for cycle length
this