Estimate your current gestational age in weeks and days from your last menstrual period (LMP), ultrasound dating, conception date, or due date. How do you want to calculate? Use Last Menstrual Period (LMP)I already know my Due DateUse Ultrasound MeasurementsUse Conception Date First day of last period * Cycle length (days) Standard is 28. Longer … Read more

Enter your fundal height measurement in centimeters to estimate its percentile at your gestational age, or estimate a pregnancy-age range from the measurement. Fundal Height (SFH) — Percentile / GA Mode: SFH percentile at a given gestational age Estimate gestational age from SFH Gestational age weeks days Measured SFH (cm) Enter the measurement from your … Read more

Enter a crown-rump length (CRL) to estimate gestational age and due date. You can also choose a target GA to see the expected CRL and published range where available. Units mm cm CRL value (mm) Measurement date (optional) Target GA for expected CRL (optional) Target gestational age weeks days Published expected-CRL data covers 8w 2d … Read more

Use this BBT time adjustment calculator when a basal temperature was taken earlier or later than usual. Enter both times and your reading to estimate the adjusted BBT. BBT Time Adjuster Usual temperature check time Actual temperature check time Units °F (default) °C Measured temperature (°F) Show advanced options Timing model Linear adjustment rate (°F … Read more

Use this tool to estimate Placenta Accreta Spectrum (PAS) risk based on placenta position and prior caesareans. It returns a simple risk band and educational next steps. Placenta Accreta Spectrum (PAS) Risk Calculator Previa status: None Low-lying Marginal previa Complete previa Prior C-sections Use 3 for 3 or more. Placenta location: Anterior Posterior Show advanced … Read more

Use this tool to interpret vanishing twin risk by week and twin type. It shows risk now, a short projection to next week, and when to seek care. Vanishing Twin / Twin Survival Probability Twin type: Di/Di (two placentas, two sacs) Mono/Di (one placenta, two sacs) Mono/Mono (one placenta, one sac) Gestational age weeks days … Read more

Use this tool to interpret antral follicle count by age. It gives an age-adjusted percentile, a plain-language meaning, and suggested re-test timing. AFC Percentile by Age (Antral Follicle Count) Age (years) AFC count Total 2–10 mm follicle count from both ovaries on an early-follicular ultrasound. Show advanced inputs Cycle day at scan (if known) Using … Read more

Use this tool to interpret a progesterone test in early pregnancy. Enter your value, unit, and gestational age or days past ovulation to see a level band and next steps. Progesterone alone cannot diagnose viability, so follow up with your clinician for concerning symptoms or unclear results. Progesterone Level Interpreter (Early Pregnancy) Units: ng/mL nmol/L … Read more

Use this tool to interpret a low-lying placenta or placenta previa by gestational age, type, and distance from the cervix. It returns an educational resolution probability and a suggested re-scan window. Placenta Previa and Low-Lying Placenta Resolution Calculator Gestational age at diagnosis weeks days Distance from internal os (mm) Report translator: “complete previa” usually means … Read more

Use this tool to interpret a subchorionic hematoma in early pregnancy based on gestational age and size of the sac. It gives an educational risk band, context, and when to seek care. Subchorionic Hematoma Risk by Week and Size Calculator Gestational age weeks days Size input mode: % of sac mm cm Hematoma size (% … Read more