I felt I had to fight to get my GP to believe me when I said I knew my EDD - he went from LMP but that put me due early August as I have long cycles due to PCOS. I knew when I had ovulated as I had been charting, temping etc but they wouldn't believe it - they go from LMP. I requested a dating scan and what would you know it came back as one day after my predicted EDD. My obs never questioned me as he knew I had PCOS (he was managing it) and with my history had a chuckle at the EDD my GP gave - he said a date from LMP for me would have caused all sorts of arguements about being overdue when bub would not have been anywhere near finished baking.
I have spoken to my Obs and he has said we will talk about it more later but he is happy for me to go over the EDD - not sure by how much just yet - provided that there are no apparent risk factors etc.
For me lying was never an option - I was truthful to get them to believe me that I knew my cycle

