IGCalcPT

Clinical obstetrics calculator: gestational age, fetal biometry and weight percentiles using the Portuguese reference charts (SPOMMF).

IGCalcPt is a precise gestational age and fetal weight percentile calculator for healthcare professionals, built around growth charts specific to the Portuguese population and recommended by the Portuguese Society of Maternal-Fetal Medicine.

KEY FEATURES

Accurate gestational age calculation: • Multiple methods: LMP, conception date, embryo transfer (day 2–5), estimated due date • Automatic conversion between dates and gestational ages • Interactive calculator for any date • Correct handling of time zones and leap years

Portuguese fetal percentiles: • Growth charts validated for the Portuguese population • Percentiles by sex (male, female, both) • Interactive fetal growth charts with zoom • Visual comparison with previous measurements

Patient management: • Profiles with clinical notes • Full measurement and percentile history • Quick search by name or ID • JSON backup and restore • PDF report export

Specialised calculators: • CRL (crown-rump length): GA at 5–14 weeks (Robinson & Fleming) • Fetal biometry: estimated weight by Hadlock (BPD, HC, AC, FL) • Automatic integration between calculators

Accessibility and privacy: • Dark mode and a dedicated high-visibility mode • Interface in Portuguese, English and French • Fully offline — all data stays on the device • No ads, no tracking, no data collection

SCIENTIFIC BASIS Based on the doctoral research of Dr. Ricardo Santos using Portuguese population data: Sousa-Santos RF, Miguelote RF, Cruz-Correia RJ, Santos CC, Bernardes JFMAL. Development of a birthweight standard and comparison with currently used standards. Eur J Obstet Gynecol Reprod Biol 2016;206:184-193.

WHO IS IT FOR Obstetricians, gynaecologists, maternal-fetal medicine specialists, sonographers, specialised nurses and residents.

MEDICAL DISCLAIMER This application is intended for qualified healthcare professionals. Calculators and percentiles are decision-support tools and do not replace clinical judgement.