Uterine Artery Notching and PI for Preeclampsia/FGR Risk

Interpret uterine artery Doppler pulsatility index (PI) and bilateral notching at 20-24 weeks for preeclampsia, FGR, and placental abruption risk. Mean PI >95th percentile plus bilateral notching has highest positive predictive value.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How to Use

Enter the values for the scenario you are assessing. Interpret uterine artery Doppler pulsatility index (PI) and bilateral notching at 20-24 weeks for preeclampsia, FGR, and placental abruption risk. Mean PI >95th percentile plus bilateral notching has highest positive predictive value. Use the uterine artery notching result to inform your calculation.

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