If your baby is measuring small
One of the most consequential findings, and one of the least precise.
A baby measuring smaller than expected can mean the placenta is not working well, which is genuinely important, or can mean the baby is constitutionally small, or can mean the measurement is imprecise. Ultrasound estimates of weight carry meaningful error, and the error is largest at the extremes.
What matters more than the estimated weight alone is whether growth is slowing over time, and what the blood flow in the cord looks like on doppler. A single small measurement is a reason for more information, not automatically a reason to deliver.
Questions to ask"Is the growth slowing, or is this baby just small?" "What did the doppler show?" "What is the plan for repeat scanning, and what finding would change the plan?"
Where this comes from:
142. Bricker L, Medley N, Pratt JJ. Routine ultrasound in late pregnancy (after 24 weeks' gestation). Cochrane Database Syst Rev. 2015;(6):CD001451.
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This page is educational. It supports the conversation with your own clinicians. It is not consent to any treatment, and it cannot assess you. If you are worried about a symptom now, see urgent warning signs.