In the pivotal clinical validation study — 247 suboptimally dated singleton pregnancies between 14 0/7 and 36 6/7 weeks gestation — Delivery Date AI demonstrated statistically significant superiority over the standard-of-care Hadlock method.
The AI achieved a Mean Absolute Error (MAE) of 15.22 days (95% CI: 13.67–16.77), compared to Hadlock's MAE of 36.41 days (95% CI: 32.88–39.94). That represents a 21.19-day absolute improvement over the pre-specified 7-day superiority margin (p<0.001) — a 58% reduction in prediction error compared to current standard of care.
These results apply specifically to the suboptimally dated population for which the device is indicated and should not be generalized to all pregnancies.
Yes. The PAIR (Perinatal Artificial Intelligence in ultRasound) study, published in the Journal of Maternal-Fetal & Neonatal Medicine (Patel et al., 2025), evaluated the AI platform's delivery timing performance across a much larger and more diverse dataset.
The PAIR study enrolled 5,714 patients across 19,940 ultrasound examinations at the University of Kentucky and satellite clinics, using over 2 million de-identified images. Across all births, the most current model version (V4) achieved an R² of 0.92 for delivery timing correlation, with an MAE of 12.90 days — and R² of 0.95 for term births specifically. Prediction accuracy was preserved across all three trimesters, with MAE ranging from 10.76 to 15.06 days.
The PAIR study also demonstrated that retraining the model with additional data progressively improved performance, highlighting the platform's continuous learning architecture.
The FDA pivotal validation cohort (N=247) included women aged 18 years and older with singleton pregnancies between 14 0/7 and 36 6/7 weeks gestation who lacked a reliable EDD — defined as an unreliable or unknown LMP and no first-trimester dating scan. The cohort was 62.8% obese (BMI ≥30) and included 63.2% White and 31.8% Black or African American patients. Asian and Hispanic populations were under-represented; results may be less characterized for these groups.
The PAIR study (N=5,714) included all pregnancies — term and preterm — across a broader population, providing a wider view of the underlying model's delivery timing capabilities across gestational ages and clinical scenarios.