Dating conception 100 azdg

Ultrasounds performed during the first 12 weeks of pregnancy are generally within 3 - 5 days of accuracy.

The most accurate time is between 8 and 11 weeks gestation.

Most dating scans are done with a trans-abdominal transducer and a fullish bladder.

Any calculation of a conception date is an estimate, even in a woman with regular 28-day menstrual cycles.The size of the baby correlates less and less with its age as time goes on.Ultrasound examinations from 12 to 22 weeks are regarded as being within 10 days of accuracy (or up to 10 days earlier or 10 days later than the woman's calculated due date).Except for in-vitro fertilization (IVF) and other assisted reproductive procedures, you cannot precisely calculate the exact day a sperm meets an egg and fertilization (conception) occurs.However, you can use various factors and knowledge about reproduction to help narrow down the date to within one to five days if your cycles are regular.

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