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What Causes Discrepancy In Determining Date Of Conception Thorugh Ultrasound?

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Posted on Tue, 4 Nov 2014
Question: hello doctor...my wife is 32 weeks pregnant. she had her ultrasound test today. her LMP is 5th of march 2015. her due date from previous ultrasound was 10th of dec 2014. but today she got 20th of dec. does that means baby is not growing properly?.I am attaching her ultrasound report of todays test.
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Answered by Dr. Dr. Soumen Patra (1 hour later)
Brief Answer:
Normal scan report. Don't be worried.

Detailed Answer:
Hello,

Thanks for writing to us.

I have reviewed your attached ultrasound scan report. It is ABSOLUTELY NORMAL with proper growth and development of growing baby. Don't be worried much.

You should know that 7-10 days discrepancy (NORMAL) may be present between original LMP calculated expected delivery date and ultrasound measured.

Ultrasound basically determines gross fetal maturity of various parameters at the time of scanning and it is then compiled to estimate expected date of delivery. Therefore, it CAN'T be always same with LMP estimated due date or previous ultrasound measured.

Hope, it helps for your information. Kindly, close the discussion if you don't have any other query.

Wish her good health and successful motherhood.

Regards,
Dr S Patra

For future query, you can directly approach me through

http://doctor.healthcaremagic.com/Funnel?page=askDoctorDirectly&docId=63326
Above answer was peer-reviewed by : Dr. Raju A.T
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Answered by
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Dr. Dr. Soumen Patra

OB & GYN Specialist

Practicing since :2011

Answered : 4060 Questions

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What Causes Discrepancy In Determining Date Of Conception Thorugh Ultrasound?

Brief Answer: Normal scan report. Don't be worried. Detailed Answer: Hello, Thanks for writing to us. I have reviewed your attached ultrasound scan report. It is ABSOLUTELY NORMAL with proper growth and development of growing baby. Don't be worried much. You should know that 7-10 days discrepancy (NORMAL) may be present between original LMP calculated expected delivery date and ultrasound measured. Ultrasound basically determines gross fetal maturity of various parameters at the time of scanning and it is then compiled to estimate expected date of delivery. Therefore, it CAN'T be always same with LMP estimated due date or previous ultrasound measured. Hope, it helps for your information. Kindly, close the discussion if you don't have any other query. Wish her good health and successful motherhood. Regards, Dr S Patra For future query, you can directly approach me through http://doctor.healthcaremagic.com/Funnel?page=askDoctorDirectly&docId=63326