Obstetric Calculators
Tools for pregnancy dating and assessment.
Obstetric Dating Calculator
Calculate LMP, EDD, and Gestational Age from any known parameter.
Biophysical Profile (BPP) Score
Assess fetal well-being based on five key ultrasound and NST parameters.
Modified Bishop Score Calculator
Predicts the likelihood of a successful labor induction.
The modified Bishop score is a scoring system that can assist in predicting whether induction of labour will be required. The score is determined from the fetal station and four characteristics of the cervix: dilatation, effacement, consistency, and position. In modifications to the score, pre-eclampsia, prior vaginal deliveries, postdates, nulliparity and PPROM (premature preterm rupture of membranes) are also taken into account.
References:
Bishop EH. Pelvic scoring for elective induction. Obstetrics and Gynecology 1964, 24: 266-8
Doppler Percentile Calculator
Calculate percentiles for Umbilical Artery Pulsatility Index (PI).
Citation: Ciobanu A, Wright A, Syngelaki A, Wright D, Akolekar R, Nicolaides KH. Fetal Medicine Foundation reference ranges for umbilical artery and middle cerebral artery pulsatility index and cerebroplacental ratio. Ultrasound in Obstetrics & Gynecology. 2019 Apr;53(4):465-72.
Used with attribution. This application is not affiliated with or endorsed by FMF.
MCA Doppler Percentile Calculator
Calculate percentiles for Middle Cerebral Artery Pulsatility Index (PI).
Citation: Ciobanu A, Wright A, Syngelaki A, Wright D, Akolekar R, Nicolaides KH. Fetal Medicine Foundation reference ranges for umbilical artery and middle cerebral artery pulsatility index and cerebroplacental ratio. Ultrasound in Obstetrics & Gynecology. 2019 Apr;53(4):465-72.
Used with attribution. This application is not affiliated with or endorsed by FMF.
Cerebroplacental Ratio (CPR) Calculator
Calculate percentiles for Cerebroplacental Ratio (MCA PI / UA PI).
Citation: Ciobanu A, Wright A, Syngelaki A, Wright D, Akolekar R, Nicolaides KH. Fetal Medicine Foundation reference ranges for umbilical artery and middle cerebral artery pulsatility index and cerebroplacental ratio. Ultrasound in Obstetrics & Gynecology. 2019 Apr;53(4):465-72.
Used with attribution. This application is not affiliated with or endorsed by FMF.
Uterine Artery Doppler Calculator
Calculate percentiles for Uterine Artery Pulsatility Index (PI).
Citation: Cavoretto PI, Salmeri N, Candiani M, Farina A. Reference ranges of uterine artery pulsatility index from first to third trimester based on serial Doppler measurements: longitudinal cohort study. Ultrasound in Obstetrics & Gynecology. 2023 Apr;61(4):474-80.
Used with attribution. This application is not affiliated with or endorsed by the author.
More Calculators Coming Soon
Additional obstetric tools are under development.
Disclaimer
All calculations must be confirmed before use. The estimated results are not a substitute for clinical judgment.
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