A member asked:

Are conception calculators accurate based off first ultrasound?

Q: are conception calculators accurate based off first ultrasound?

: Conception determined by "first U/S" are approximate, and do not accurately determine the actual "due date" or ovulation date, as ovulation may be often delayed, and the U/S only measures correlation of fetal dimensions with estimated fetal age, but size and growth rate variations distort the accuracy of either due date or last ovulation.

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Dr. John Berryman answered

Conception determined by "first U/S" are approximate, and do not accurately determine the actual "due date" or ovulation date, as ovulation may be often delayed, and the U/S only measures correlation of fetal dimensions with estimated fetal age, but size and growth rate variations distort the accuracy of either due date or last ovulation.

Answered 11/4/2021

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A member asked:

Are conception calculators accurate based off first ultrasound?

A doctor has provided 1 answer

Dr. John Berryman answered

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