IGCalcPT

IGCalcPt is the most accurate gestational age and fetal weight percentile calculator for healthcare professionals in Portugal. Developed by a specialist in Obstetrics and Gynecology, this app uses fetal growth charts specific to the Portuguese population, currently recommended by the Portuguese Society of Maternal and Fetal Medicine (https://www.spommf.pt/wp-content/uploads/2020/04/SPOMMF_Valores-de-referencia_vf.pdf).

Main Features

Accurate Gestational Age Calculation:
Multiple calculation methods: LMP, conception date, embryo transfer, expected delivery date
Automatic conversion between gestational dates and ages
Interactive calculator for any specific date
Accurate management of time zones and leap years

Portuguese Fetal Percentiles:
Validated growth charts for the Portuguese population
Percentile calculation by sex (male, female, both)
Interactive fetal growth charts
Visual comparison with previously saved data

Patient Management:
Creation and editing of patient profiles
Complete measurement history and percentiles
Quick search by name or ID
Data stored locally for maximum privacy
Patient backup and restore
Patient report .pdf exports

Specialized Calculators:
Crown-Rump Length (CRL): Calculation of GA by crown-rump length (5-14 weeks)
Fetal Biometry: Estimated weight using Hadlock's formula (BPD, HC, AC, FL)
Automatic integration between calculators
Clinical validation of measurement intervals

Advanced Visualization:
Interactive graphs with zoom and navigation
P3, P10, P50, P90, P97 percentile curves
Marking of current and historical measurements
Dark mode support
Apple Quick actions support

Technical Features:
Complete Privacy
All data stored locally on the device
No information shared with third parties
No usage data collection
No advertising or tracking

Multilingual Support
Portuguese and English interface
Cultural adaptation of date formats
Accurate medical terminology

Optimized Performance:
Full offline functionality
Optimized for iOS and iPadOS

Scientific Basis:
This application is based on research developed as part of Dr. Ricardo Santos's doctoral thesis, using data from the Portuguese population. The fetal growth charts have been validated and are currently the reference recommended by the Brazilian medical community. Scientific Reference:
Sousa-Santos RF, Miguelote RF, Cruz-Correia RJ, Santos CC, Bernardes JFMAL. Development of a birthweight standard and comparison with currently used standards. European Journal of Obstetrics and Gynecology and Reproductive Biology 2016;206:184-193.

Who Should Use It:
Obstetricians and gynecologists
Maternal-fetal medicine specialists
Sonographers
Specialized nurses
Specialty internists

Contexts of Use:
Prenatal surveillance consultations
Fetal medicine units
Emergency obstetric services
Medical education and training
Clinical research

Medical Notice
This application is intended exclusively for qualified healthcare professionals. The calculators and percentiles provided are diagnostic aids and do not replace clinical judgment. All results should be interpreted in the appropriate clinical context.

About the Developer
Developed by Dr. Ricardo Santos, a specialist in Obstetrics and Gynecology with a subspecialty in Reproductive Medicine, with a Master's degree in Medical Informatics and a PhD in Clinical Research and Health Services. He works at ULSAAve (Guimarães Hospital) and Ferticare (Braga), and is also a professor at the Faculty of Medicine of the University of Porto.