How accurate are due dates?!

Question

I had my first ultrasound back in September. Baby was 8 weeks and 2 days but from my LMP it was guessed I was around 9 weeks and 3 days and they gave me a due date of April 22nd which would have made my conception date July 16th... are the due dates and measurements of first ultrasounds pretty accurate? My date hasn’t changed and I’m 25 weeks so I’m assuming it probably is, just want a little more knowledge! Thanks!

Answer

Rosy ultrasound is the most accurate so go by that.

Answer

the most accurate determination of the due date / gestation is the first ultrasound done within the first trimester

Answer

Depends. When based off your LMP if depends if you ovulate earlier or later than the “norm” and so it could very easily be off. Usually the first ultrasound is your dating scan which they then will determine your actual due date from there.

Answer

They are all estimations and could be incorrect or off a couple of weeks.

How accurate are due dates?!

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