Are dating scans more accurate than lmp
Category: New Zealand
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Early pregnancy signs and symptoms. Does late conception affect the baby? How accurate are dating scans? How inaccurate can dating scans be? Increased urination 2 days after conception?! How early did you all have pregnancy symptoms after conception?
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Wrong due date from ultrasound scan - why it happens - MadeForMums
Back to Your pregnancy care. If you're pregnant in England you'll be offered an ultrasound scan at around 10 to 14 weeks of pregnancy. This is called the dating scan. It's used to see how far along in your pregnancy you are and check your baby's development. The scan may also be part of a screening test for Down's syndrome.
Frustrated by the LMP dating system
Objective: To compare last menstrual period and ultrasonography in predicting delivery date. Methods: We used ultrasound to scan 17, nonselected singleton pregnancies at completed weeks. The last menstrual period LMP was considered certain in 13, and uncertain in cases. The duration of pregnancy from the scan to the day of spontaneous delivery was predicted by crown-rump length, biparietal diameter BPD , and femur length FL using linear regression models, and the results were compared with estimates based on LMP.
They also grow in spurts and at different rates. Eventually at about 10 weeks my OB adjusted my due to be a week sooner and based my c-section off that. Which was always explained as growth spurts.