Domestic Dogs
Dog Care

When is the best age to have an ultrasound to find edd when lmp is unknown?

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Wiki User
2006-09-07 06:55:17

The earlier and ultrsound is performed the more accurate it is.

Usually around 7 weeks. But any time in the first 20 weeks is

accurate to within 5 days. After this babies weights start to vary

too much the estimate to be as accurate.

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