ivf

[bonzer]

i have recently gone through ivf and have become pregnant, for which I am over the moon about, my first day of my last period was the 10th of october 06, i started my injections on the 8th of october 06, my egg collection was the 3rd of november and the transfer was on the 8th of november, I did my pregnancy test on the 21st of november as I have said was positive, I have a scan on next friday the 1st of december I have made it out that I am 3 weeks pregnant but my doctor has said that you go from the first day of your last period so I am confused as yes this would be the case for a natural pregnancy but does it mean the same for ivf, if so how far am I gone