My last period was on 21 August 2012 my cycles chnage but on average around about 32 33 days. Given that my last period was on the 21st my midwife gave me an EDD of 29th may 2013 which is 40 weeks from my LMP however when i went to my 12 weeks scan i was only 9 weeks 3 days and my due date changed to 18 june 2013 and my daughter came on the 19th june i was just wondering does this mean i actually conceived later than usual because thats a 3 week difference in dates and given that my daughter came around the time of the EDD given from the scan its more correct??