American Journal of Obstetrics and Gynecology

Interactive evidence explorer on how family planning lowers maternal mortality. Compares maternal-death ratios across high-resource countries (U.S. 22.3, U.S. Black 49.5 per 100,000 vs. peers), maps the direct and indirect pathways, and summarizes the 7 studies behind the review. Li & Peipert. AJOG 2026.

Estimates gestational age from second-trimester biometry (HC, AC, FL, BPD) and shows the published 95% error range (±2 SD) on every estimate. Auto-selects the most accurate equation; handles singletons, twins, and triplets with validated combination rules. Derived in 152 singleton, 67 twin, and 19 triplet IVF gestations; validated 14–22 weeks. Chervenak et al. AJOG 1998;178:678-87.

Branching decision support for cervical length screening and short-cervix management in singleton pregnancy. Routes by prior preterm birth, cervical length, and cerclage status to vaginal progesterone and cerclage decisions. Reflects the 2023 FDA withdrawal of 17-OHPC. Boelig et al. AJOG 2021;225:179.e1-6, 2022;226:722.e1-12, 2019;221:263.e1-7; ACOG PB 234.

Live risk stratification for recurrent spontaneous PTB based on cervical length (18–24 wks) and gestational age of most recent prior delivery. Observed rates at <32, <34, and <37 weeks from 1,316 untreated patients across 7 international cohorts. Results update instantly. van Dijk et al. AJOG MFM 2026;8:101927.

AI-powered clinical and ethical decision support for cesarean delivery on maternal request. Systematically screens absolute and relative indications, classifies the scenario, and generates individualized counseling language grounded in the Professional Responsibility Model. Chervenak et al. AJOG 2026; Alperin & Artsen JAMA 2026; ACOG CO 761.

SMFM 2024 emergency checklist for unexpected placenta accreta spectrum. 6-phase interactive protocol with decision branching, real-time EBL and transfusion tracking. AJOG 2024;230(1):B2-B11.

Plot cervical exams against 5th-95th percentile reference bands from the Hamilton 7-variable model. 61% less prediction error. AJOG 2024, n=8,022.

Interactive labor curves by BMI class (normal to Class III obesity) across 41,868 vaginal deliveries. Compare latent/active phase durations by parity and labor onset. Custom overlay for any subgroup combination. Edwards et al. AJOG 2026.

Day-specific EFW percentile using NICHD Unified 2022 standard (N=2,802). Compares all 8 gestational-age classification methods from Grantz et al. AJOG 2026 — shows how completed-week rounding misclassifies up to 50% of SGA fetuses. Growth curve with 5th/10th/50th/90th percentile bands.

Intrapartum fetal risk assessment using the 8-component FRI scoring system (EFM parameters, uterine activity, maternal/obstetrical/fetal risk factors). Real-time green/yellow/red zone classification with 40-minute shot clock protocol. FRI sensitivity 100% vs. 45% for ACOG Category III. Evans et al. AJOG 2023.

Learn the FRI interactively: build an 8-point score live, explore the maternal/obstetrical/fetal risk-factor catalog (Table 4), and see head-to-head sensitivity (FRI 100% vs. Category III 45% vs. ACOG monograph 28%), the 40-minute shot-clock protocol, and Kaplan–Meier neonatal recovery. Evans et al. AJOG 2023.