IGCalcPT

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 • Before a patient's dating is changed, shows today's GA by the stored dating and by the new one • Correct handling of time zones and leap years Portuguese fetal percentiles: • Growth charts validated for the Portuguese population • Percentiles by sex (male, female, both), with one decimal below P10 and above P90 • Twins and triplets: each fetus with its own reference table, and weight discordance flagged from 20% • Interactive fetal growth charts with zoom • Visual comparison with previous measurements Patient management: • Profiles with clinical notes • Full measurement and percentile history; saved weights can be corrected • Saved weights follow a corrected dating and the fetal sex • Close a pregnancy and start the next one on the same record • Undo after deleting a patient, a weight or a pregnancy • Quick search by name or ID • JSON backup and restore • PDF report with chart and measurements, dated, with the GA on the day 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: data are stored on the device and are not sent to the developer • The device's own backup may include the data • 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.