Even dating scans can be inaccurate for the due date, but they are never as inaccurate as using the menstrual period. For instance a dating scan done at 6 weeks could get the date wrong five days either way.
Is dating scan at 9 weeks too early?
Between 8 – 12 weeks of pregnancy is a good time for a dating scan. A 2-D image of a baby at about 8-9 weeks. Small arms are becoming visible, sticking out slightly in the middle of the baby.
What are the chances of a miscarriage at 9 weeks?
Results: One case was lost to follow-up. The risk of miscarriage among the entire cohort was 11 of 696 (1.6%). The risk fell rapidly with advancing gestation; 9.4% at 6 (completed) weeks of gestation, 4.2% at 7 weeks, 1.5% at 8 weeks, 0.5% at 9 weeks and 0.7% at 10 weeks (chi(2); test for trend P=. 001).
Can you tell the gender at 9 weeks?
(New blood-based tests that rely on cell free DNA can detect your babys gender as early as 9 weeks, without increasing the risk of miscarriage, but these are only about 95% accurate in the first trimester).