Most medical evidence lives in journals that patients never see and clinicians rarely revisit. LiveEvidence changes that. Using proprietary methods, each tool here is built directly from peer-reviewed publications — transforming one-dimensional data into interactive calculators, risk assessments, and visual explorers that clinicians can use at the bedside and patients can understand at home.

Every number in every tool comes directly from the published data — nothing is estimated, nothing is invented, nothing is approximated. If it is not in the original publication, it is not in the tool. Where studies disagree on which data best reflects reality — and they often do — we integrate findings across multiple peer-reviewed sources to build tools that are more precise than any single publication alone.

Same evidence. Now accessible. Made live.

Amos Grünebaum, MD — Professor of Obstetrics & Gynecology

interactive tools — updated weekly
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Pregnancy

Fetal Biometry Gestational Age Calculator New
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.
CalculatorIVF Cohort
Short Cervix & Preterm Birth Prevention Pathway New
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.
Decision SupportRCT + Guideline
Recurrent Preterm Birth Risk Calculator New
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.
Risk CalculatorIPD Meta-Analysis
CDMR Counseling Tool New
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.
Decision SupportEthics
Labor Probability Calculator New
Personalized day-by-day probability chart for spontaneous labor onset from today. Adjusted for 10+ clinical factors: BMI, parity, cervical length, dilation, effacement, prior preterm/post-term history, twins, and more. Rosenbloom 2019, Iams 1996, Romero et al.
CalculatorSurvival Model
Preterm Birth Decision Support New
Evidence-based clinical decision support for spontaneous preterm birth risk assessment, cervical length interpretation, and management pathways including vaginal progesterone and cerclage. Romero, Hassan et al.; SMFM 2016.
Decision SupportRomero
Cervical Length Percentile Explorer New
Interactive normative percentile curves (5th–95th) for transvaginal cervical length at 16–40 weeks. Compare Romero/Gudicha 2021 (N=5,188) and Iams 1996 MFMU curves. Plot patient CL with instant percentile interpretation. SMFM 25 mm threshold shown.
Evidence ExplorerRomero
Pregestational Diabetes Antepartum Checklist New
Interactive antepartum checklist for Type 1 and Type 2 diabetes. Covers all trimesters, delivery planning, and postpartum transition. Generates dated visit summary. SMFM Special Statement, Pregnancy 2026;2:e70264.
ChecklistSMFM 2026
Perinatal Antidepressant Decision Support New
PETRUSHKA-inspired personalized antidepressant selection for preconception, pregnancy, and postpartum. Combines clinical predictors with patient side-effect preferences. Built-in PHQ-2 screener. Cipriani et al. JAMA 2026, ACOG CPG No. 5 2023, LactMed 2025.
Decision SupportRCT
Finding the Right Antidepressant for You New
Patient-facing personalized antidepressant guide. Matches medicine to individual side-effect priorities through a 5-step interactive tool. PETRUSHKA trial — reduced early stopping from 27% to 17%. Cipriani et al. JAMA 2026;335(14):1219–1231.
RCTPatient Tool
The Vanishing Normal Weight
U.S. prepregnancy obesity and normal weight trends by race/ethnicity, 2016-2024. 32.7 million births from CDC natality data.
Data Explorer5 Languages
PAS Screening & Evaluation Tool
Placenta accreta spectrum risk calculator with Placenta Accreta Index (PAI) scoring (AUC 0.87), PAS2 consensus imaging protocol, and 7-marker ultrasound checklist.
Risk CalculatorPAI Validated
PAS Emergency Checklist — Interactive
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.
ChecklistSMFM 2024
Atonic PPH Risk Assessment
19 risk factors with pooled odds ratios from meta-analysis. Calculates combined OR, estimated probability, and suggested actions.
Risk Calculator7 Languages
ASPRE Aspirin Eligibility Screener
First-trimester risk stratification for preterm preeclampsia. Enter maternal history, MAP, UtA-PI, PAPP-A, and PlGF to assess aspirin eligibility per ASPRE trial criteria (NEJM 2017, OR 0.38, P=0.004).
Risk CalculatorRCT
BAD Score — Postpartum Bleeding Risk
Predicts life-threatening bleeding at hospital admission. 7-factor score validated in 43,450 women across 22 countries. AUROC 0.80. Lancet Glob Health 2026.
Risk Calculator4 RCTs7 Languages
Labor Progress Tracker — Multifactor Partogram
Plot cervical exams against 5th-95th percentile reference bands from the Hamilton 7-variable model. 61% less prediction error. AJOG 2024, n=8,022.
Evidence ExplorerCohort Study
BMI & Labor Progression Explorer New
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.
Data ExplorerCohort Study
Vaginal Progesterone Evidence Explorer
IPD meta-analysis of 3 RCTs (n=686). Filter outcomes, view relative risks with CIs for short cervix without prior preterm birth.
IPD Meta-Analysis
Fetal Biometry Comparison Tool
Compare fetal measurements across standard biometry references. Visualize percentiles for BPD, HC, AC, FL, and EFW.
Data ExplorerBiometry
NICHD Fetal Growth Percentile Calculator New
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.
Calculator
Fetal Reserve Index Calculator New
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.
CalculatorAJOG 2023
Fetal Reserve Index — Interactive Explainer New
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.
ExplainerAJOG 2023
hCG Calculator
Calculate hCG doubling time and 48-hour rise. Evidence-based assessment using Barnhart 2004 and Morse 2012 thresholds by initial hCG level.
CalculatorEvidence-Based

Guidelines & Protocols

WHO PPH Guidelines Navigator New
Interactive companion to the WHO 2025 consolidated guidelines for postpartum haemorrhage (first WHO·FIGO·ICM joint guideline). Bedside tool applies the new objective diagnostic criteria (≥300 mL plus a haemodynamic sign, or ≥500 mL) and the E-MOTIVE first-response bundle, plus a filterable explorer of all 51 recommendations across the care continuum. WHO 2025; Gallos et al. Lancet 2025; NEJM 2023;389:11-21.
Decision SupportWHO 2025
The Well-Woman Chart — Interactive New
The 2026 ACOG Foundation / WPSI Well-Woman Chart made interactive across all seven age bands. Pick patient or clinician, enter an age, and get exactly which preventive services apply — plain language for patients, full selective-screening criteria and recommendation source (USPSTF A/B, WPSI, Bright Futures) for clinicians. Dual audience, no login.
Patient + ClinicianWPSI 2026
NTSB Ob Safety Recommendations New
24 safety recommendations in NTSB format addressing structural deficiencies in American obstetric adverse outcome investigation. 7 domains: investigation infrastructure, reporting, methodology, standard of care, communication, system factors, and accountability. Report OB-SR-2026-01. Grünebaum 2026.
Safety ReportNTSB Model
ACOG vs AWHONN Labor Guideline Navigator
Side-by-side comparison of ACOG and AWHONN guidance across FHR monitoring, uterine activity, oxytocin management, and labor protocols. 14 discrepancies, 8 agreements, 1 critical gap on tachysystole.
Evidence ExplorerGuideline Review