Enter age, height and weight or BMI, select pregnancy or postpartum, and add optional risk factors. The calculator totals VTE (venous thromboembolism) risk points and shows a simple risk band. Use with a clinician. Patient’s current situation Patient is pregnant Patient has given birth (postpartum) Height and weight Imperial (ft, in, lb) Metric (cm, kg) … Read more

Enter age, BMI or height and weight, ethnicity, prior vaginal birth, any vaginal birth since the caesarean, and whether the prior indication is recurrent. The result shows a VBAC probability and a simple score for counselling. Age (optional) No age? We’ll assume 30 years. Ethnicity (optional) African American Hispanic White / Other No choice? We’ll … Read more

Enter the five findings from a cervical exam to get a Bishop score. The result shows how ready the cervix is for labour and whether induction is likely to work. Dilation (cm) Choose the closest finding closed 1–2 cm 3–4 cm ≥5 cm Effacement 0–30% 40–50% 60–70% ≥80% Cervical consistency Firm Moderately firm Soft Fetal … Read more

Enter a crown-rump length to see the expected NT, then enter your measured NT and gestational age to get a percentile and a simple normal range check. Estimate your nuchal translucency Crown rump length (CRL, mm) Estimated gestational age (days) Auto filled from CRL. You can edit this if your scan reported GA directly. Estimate … Read more

Enter gestational sac length, width, and height to get the mean sac diameter (MSD) and an early gestational age estimate. You can also enter a single MSD and add a scan date for context. Mean Sac Diameter (MSD) ➜ Early Gestational Age Length (mm) Width (mm) Height (mm) Show advanced options Units mm cm Use … Read more

Enter your ovulation date and the first day of your next period. The calculator returns your luteal phase length in days and classifies it as short, normal, or long. Luteal Phase Length Calculator Last ovulation date First day of period (after above ovulation) Show advanced options Counting method (label only) Standard (ovulation → day before … Read more

Enter a fundal height (SFH) in cm to see its percentile for a given gestational age, or switch modes to estimate GA from SFH. You’ll also get the expected SFH, standard deviation, and a ± GA band. Fundal Height (SFH) — Percentile / GA Mode: SFH percentile at a given gestational age Estimate gestational age … Read more

Enter a crown-rump length (CRL) to see gestational age and an estimated due date. You can also pick a target GA to see the expected CRL and a typical range. Crown–Rump Length (CRL) → GA & EDD Units mm cm CRL value (mm) Measurement date (optional) Target GA for expected CRL (optional) Target gestational age … Read more

Took your basal temp at the wrong time? Use this tool to adjust an early or late reading back to your usual check time. It returns the adjusted BBT and the difference. BBT Time Adjuster Usual temperature check time Actual temperature check time Units °F (default) °C Measured temperature (°F) Show advanced options Timing model … 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