A member asked:

Why my baby ultrasound show less age then actuall age... i am 34 and ultrasound show that i am 32 weeks pregnent.last mansual first date 29 march...

7 doctors weighed in across 5 answers
Dr. Robert Grindstaff answered

Specializes in Addiction Medicine

Some ultrasounds: and providers date from the first day of the last period which is 2 weeks longer than the actual age from expected conception.

Answered 10/7/2016

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Wait: Doctor will probably do some serial ultrasounds to make sure the baby is developing normally.

Answered 12/1/2014

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Ultrasound not exact: The ultrasound is accurate plus or minus two weeks from the actual dates estimated by the last menstrual period.

Answered 2/24/2017

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Dr. Bruce J. Stringer answered

Specializes in Radiology

Don't worry: Was this your first sono? If so then your dates could be off. If your dates were confirmed by an earlier sono the fetus may be slightly smaller than average (half of all pregnancies are), or the ultrasound measurements may have been inaccurate. Your OB may want to repeat the exam in 2 weeks to check that the fetus is growing appropriately. We don't get bent out of shape based on 1 exam.

Answered 1/28/2016

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Sonogram is 100%: There will be a discrepancy a s the pregnancy progresses.There is less accuracy in terms of date.If you are a small individual then as the pregnancy. May reflective of the child's genetic disposition to be on the small size.

Answered 11/30/2014

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