No more ultrasounds after 20 weeks?

Is it normal for a doctor to not schedule any more ultrasounds for a pregnancy after 20 weeks? I thought that it was customary to have one around 30 weeks to make sure things are still developing correctly... Then again, I know that there are still unanswered questions about an ultrasound's effect on a baby...... show more Is it normal for a doctor to not schedule any more ultrasounds for a pregnancy after 20 weeks? I thought that it was customary to have one around 30 weeks to make sure things are still developing correctly... Then again, I know that there are still unanswered questions about an ultrasound's effect on a baby... still, did anyone else not have any more after 20 weeks?
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