Pregnancy due date based on ultrasound dating dating idea lds

05-Apr-2019 06:53

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Pregnancy dating with ultrasound is best done in the first trimester, at around 11 to 13 weeks.

Scans done at this point have the highest degree of accuracy in estimating the due date, with only a small margin of error.

It is usually prudent to repeat the scan in a span of 3 to 4 weeks, and see whether there is conformity in estimating the due date.

A big margin of error still exists though, raising caution about inducing labor too early and inadvertently contending with a pre-mature baby. Please get back to your obstetrician and review all the suggested dates backwards.

Want more information about how the weeks, months, and trimesters of pregnancy are counted?

A due date calculator calculates your estimated due date (EDD) which is an ESTIMATE of the day you are likely to go into labor spontaneously (without medical intervention).

Dear Dr Murage, ALSO READ: Confessions: Should I keep this old man’s baby?

I have had several scans in my now advanced pregnancy, and each gives me a different estimated due date.

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Very few expectant moms know exactly when they conceived, however.Subsequent scans done further into the second and third trimester have increasing margins of error, and can be erroneous by a factor of weeks.