General calculators
Pregnancy Due Date Calculator
Estimate your baby’s arrival from LMP or ultrasound.
Ovulation Calculator
Find your most fertile days and ovulation date.
Implantation Calculator
Estimate your implantation window and best day to test.
Twin & Triplet Due Date
EDD plus typical delivery windows for multiples.
IVF/FET Due Date
EDD from transfer date (Day 3/5/6) + GA today.
Ultrasound Due Date
EDD from scan date and gestational age at ultrasound.
Pregnancy Chance Calendar
See your daily conception odds across the cycle.
Advanced Pregnancy Chance
Refine your estimate with age, BMI, and other factors.
One-Time Pregnancy Chance
Estimate odds from a single encounter.
Fertility by Age
How age affects natural fertility rates.
Miscarriage Risk
Data-based estimate of miscarriage risk.
Pregnancy Test Accuracy
Estimate accuracy by DPO and brand.
hCG Levels & Doubling Time
Doubling/halving time, typical range, and projection.
Conception Date
Find conception from LMP, EDD, or ultrasound.
Reverse Due Date
Work backward from EDD to estimate conception.
Due Date by Intercourse Date
EDD, birth-probability calendar, progress, fetal size.
Fertility Calculator
All-in-one calculator.
Am I Pregnant? Calculator
Likelihood band for this cycle and next test day.
Morning-After Pill Effectiveness
Effectiveness vs hours since sex, with BMI context.
Missed Pill Risk
Risk after a late or missed pill, with EC guidance.
Contraceptive Risk
Advanced per-act risk with lifestyle modifiers.
Combine Methods
Estimate combined per-act risk for two methods.
After Unprotected Intercourse
Incident risk, EC timing, and first accurate test day.
Pregnancy Chance (simple)
Quick per-act estimate from age and method.
Implantation Bleeding
Implantation vs period likelihood and when to retest.
Chance of Twins
Baseline twin risk with DZ/MZ split and scenarios.
Late Period Probability
Pregnancy likelihood vs late cycle with retest timing.
OPK to Ovulation Timing
Estimate ovulation after your first positive OPK.
LAM Eligibility and Risk
Meets LAM today, effectiveness, and when to switch.
Period Calculator
Predict your next period window and cycle day.
Time to Get Pregnant
Per cycle and cumulative odds with when to seek help.
Egg Freezing Success Rate
Chance of at least one live birth from your frozen eggs.
Return to Fertility: Depo
Timeline to ovulation and first period after Depo.
Subchorionic Hematoma Outcome
Risk band, resolution by week, and re-scan window.
Placenta Previa / Low-Lying Resolution
Chance it resolves by 28/32/36w, plus re-scan timing.
Progesterone Level Interpreter
Band for GA/DPO, 48–72h retest, pair with hCG.
AFC Percentile by Age
Age-adjusted percentile and expected egg yield.
Miscarriage Risk After Heartbeat
Risk now by GA & FHR, plus next-scan trend.
Placenta Accreta Spectrum (PAS) Risk
Banded risk with follow-up imaging notes.
Method-specific & niche
IUD Pregnancy Risk
Per-act risk, strings check, and EC timing guidance.
IUI Success Rate
Per-cycle and cumulative odds across attempts one to three.
Clomid or Letrozole Ovulation Day
Ovulation window from dose and last pill date.
Tubal Ligation Failure Risk
Annual and cumulative risk with what to do next.
Vasectomy Failure Risk
Annual and cumulative risk plus PVSA context.
The Pill Pregnancy Risk
Pill type, adherence, and timing vs fertile window.
Condom Pregnancy Risk
Typical vs perfect use, breakage or slippage.
Withdrawal (Pull-Out) Risk
Per-act risk with EC timing guidance.
PCOS Ovulation Calculator
PCOS aware ovulation window and next two best days.
Sperm Morphology Lookup
Morphology classification and plain language result.
IVF Success Rate by Age
Per-cycle and total chance across complete cycles (own vs donor).
IUI Success Rate by Age
Per-cycle and total chance across attempts with clean line charts.
Menstrual Cycle Calculator
See your cycle day and phase today, plus an estimate of ovulation and a 5-day fertile window.
BBT Ovulation Calculator
Estimate ovulation from your BBT log with a ± window, confidence, fertile days, DPO and a temp chart.
Cervical Mucus Fertile Window
Use a 7–10 day CM log to see your fertile window, today’s fertility level and a likely ovulation day.
Get Pregnant After IUD Removal
Estimate months to ovulation after IUD removal with first period window, probability by month and test timing.
AMH Levels by Age Calculator
See your AMH percentile and band by age, with unit conversion, plain-language notes and trend if you add past results.
Get Pregnant After Implant Removal
Estimate months to ovulation after Nexplanon or Implanon removal, first period window and when to seek care.
Get Pregnant After Stopping the Pill
See likely return of ovulation after stopping COC or POP, fertile windows for two cycles and 3/6/12 month chances.
Semen Analysis & TMSC Calculator
Enter volume, count, motility and morphology to get TMSC, WHO 6th labels and next steps.
Embryo Grade Success Rate
Estimate implantation and live birth odds by grade, age and day, plus multiples risk if transferring two.
Postpartum Ovulation Calculator
Check LAM eligibility and the probability ovulation has returned, with first fertile window and when to test.
Vanishing Twin Probability
Per-twin survival/loss estimates and trend by week.
Gestational Age Calculator
Weeks+days today, days to EDD, and trimester.
MSD Calculator (Mean Sac Diameter)
Compute MSD and estimate early gestational age.
Luteal Phase Length
Days from ovulation to period; short/normal/long.
Fundal Height (SFH) Percentile
Percentile at GA, expected SFH & SD, or SFH → GA.
CRL Calculator
Crown–rump length to GA and estimated due date.
BBT Time Adjustment
Adjust a BBT taken early/late to your usual time.
Nuchal Translucency
Estimate NT from CRL and check the GA percentile.
Bishop Score
Calculate induction readiness from five factors.
VBAC Probability
Estimate chance of vaginal birth after caesarean.
Pregnancy VTE Score
Score antenatal or postpartum VTE risk.
Stillbirth Risk
Estimate risk using baseline, BMI, age, and factors.
hCG 48-Hour Change
Two draws → % change and 48-h normalized rate.
hCG by Week
Enter GA (or DPO) to see the typical hCG band.
BPD → GA
Convert BPD (mm) to GA with percentile.
FL → GA
Enter FL (mm) to get GA and percentile.
EFW Percentile
Percentile for EFW at your gestational age.
Screening Windows
See date ranges for NT, NIPT, anatomy, GDM, Tdap.
Twin Discordance %
Enter twin values → % difference and label.
Doppler Reference
UA/MCA PI, RI, PSV bands by gestational age.