I had blood test done to confirm pregnancy and Dr seems to think my dates are different to my calculations. How accurate are HCG levels at determining weeks roughly? There is a difference of 4 weeks between LMP based dates and HCG dates from Dr. I have my dating scan referral but no idea when to go now since the difference.
Can anyone help me out here?
And no I don't know what the HCG levels were, I should have asked but I completely forgot.