Hey ladies...I was curious as to weither or not any of you have been given a wrong due date? Or your baby's measurement's were off?? My problem is....I know for a fact without a doubt on my dates!!! Me and my partner were together everyday the 4th-9th of may (without protection and he ejaculated in me several times) . What's getting me confused is the fact that my due date seems off by a week..Give or take a few day's. According to the due date if I count back that put's my conception date around the 18th!!!! I have expressed my concern to the doctor and he has said that the measurement's of the baby are what they go by now instead of my period?? He also said I would have had to concieved around the 18th, but the last time we slept together was the 9th?? I am getting so angry with him because he dosen't seem to believe me when I tell him that I know my dates!!! I asked him if the baby couldn't just be a little smaller for week's pregnant and he said all babys grow the same in the first tri-mester, has anyone else had problems with due date or ultrasound being off by a week or so?? Please any advice would be helpful. Thanks.....Also if there are any woman who are due around the first of february and know your dates that would help also!!