OB Pregnancy Wheel Made Easy

The Pregnancy Calculator

OB Wheel brings the precision of clinical pregnancy dating tools to your iPhone, iPad, and Mac. Whether you're an obstetrician, midwife, nurse, medical student, or expectant parent, OB Wheel provides accurate, evidence-based pregnancy calculations following ACOG Committee Opinion No. 700.

ACCURATE CALCULATIONS, MULTIPLE METHODS

Calculate due dates using any dating method:
• Last Menstrual Period (LMP)
• Conception/Ovulation Date
• Ultrasound Dating with ACOG-compliant redating thresholds
• IVF/ART with embryo transfer support (Day 3, 5, or 6)
• Known Due Date reverse calculation

COMPREHENSIVE PREGNANCY INFORMATION

Every calculation provides:
• Estimated Due Date with countdown
• Current Gestational Age in weeks and days
• Trimester milestones (13w, 27w, 39w)
• Expected fetal size and weight
• Full term date (39 weeks)
• Interactive OB Wheel visualization

PATIENT MANAGEMENT

Keep track of multiple pregnancies:
• Save patients with pregnancy records
• Add ultrasound measurements
• Monitor redating recommendations
• Store clinical notes
• Track pregnancy progression over time

BEAUTIFUL, PROFESSIONAL INTERFACE

• Clean, medical-grade design
• Dark mode support
• Haptic feedback for interactions
• Accessibility features throughout
• Customizable display preferences

PRIVACY FIRST

• All calculations performed on-device
• Patient data stored securely in your private iCloud
• No third-party tracking
• HIPAA-minded design principles
• You own your data

PERFECT FOR:

Healthcare Professionals:
• Obstetricians and gynecologists
• Midwives and nurse practitioners
• Family medicine physicians
• OB/GYN residents and medical students
• Labor & delivery nurses

Expectant Parents:
• Track your pregnancy week by week
• Understand your ultrasound dates
• Know when you'll reach each trimester
• Share milestones with family

FEATURES AT A GLANCE

Multiple dating methods (LMP, conception, ultrasound, IVF)
Patient and pregnancy tracking
Ultrasound measurement database
Interactive pregnancy wheel
Fetal growth estimates
Clinical reference materials
iCloud sync across devices
Share calculations easily
Offline functionality
No subscription required

EVIDENCE-BASED ACCURACY

All calculations follow guidelines from:
• ACOG Committee Opinion
• Standardized first-trimester CRL dati