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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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Can Irregular Periods Lead To False Delivery Date?

Hello im preg I got my blood screen results online and tested positive for ds . 1 out of 270 . I m only 20 yrs old. Ok my question is that they have the wrong due date . When I went for my first sano My baby measured 8 weeks 5 days but on the sano it shows ga: 16w2 days there wrong they are going by the last day of My period but I m so irregular witch was October but U really got pregnant around Jan maybe end of December. So could that made the results false? Please help
Tue, 26 Aug 2014
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General & Family Physician,  's  Response
Hello ma'am and welcome.

Do not worry about the LMP or due date based on the LMP. The ultrasound examination will calculate the gestational age more precisely based on the size and growth of the fetus (femur length, etc.) and calculate your due date.

Whether they are accurate or not, you will deliver when the baby has grown and it is time to deliver, so you please do not worry about anything and leave the worrying to your doctor.

Irregularity in your menstrual cycle can lead to a miscalculation, but the ultrasound will be more accurate.

Best wishes.
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Can Irregular Periods Lead To False Delivery Date?

Hello ma am and welcome. Do not worry about the LMP or due date based on the LMP. The ultrasound examination will calculate the gestational age more precisely based on the size and growth of the fetus (femur length, etc.) and calculate your due date. Whether they are accurate or not, you will deliver when the baby has grown and it is time to deliver, so you please do not worry about anything and leave the worrying to your doctor. Irregularity in your menstrual cycle can lead to a miscalculation, but the ultrasound will be more accurate. Best wishes.