General calculators
Pregnancy Due Date Calculator
Estimate your baby’s arrival from LMP or ultrasound.
Miscarriage Risk
Week-by-week risk estimate, including after-heartbeat context.
hCG Calculator & Doubling Time
Calculate beta-hCG doubling time, rise, and chart.
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.
Pregnancy Test Accuracy
Estimate accuracy by DPO and brand.
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.
Emergency Contraceptive Pill Effectiveness
Effectiveness vs hours since intercourse, 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: DMPA injection
Timeline to ovulation and first period after DMPA injection.
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.
IUI Due Date Calculator
Estimate an EDD and pregnancy timeline from an IUI date.
Conception Chance Per Month
Estimate per-cycle and cumulative conception chances.
Age and Fertility
Estimate age-based monthly pregnancy chance and see the evidence guide.
Conception Date vs Intercourse Date
Compare intercourse, conception, and due-date timing.
Pregnancy Test Timeline for Multiple Sex Dates
Compare several sex dates with a pregnancy test date and see each 21-day testing point.
Sex After Plan B or ella Timeline
Compare sex dates with Plan B or ella timing, contraception restart guidance and pregnancy testing.
Cycle Length Calculator
Calculate each cycle length, your average and range from consecutive period start dates.
Pregnancy Chance by Cycle Day
Explore estimated pregnancy chance by cycle day using your cycle length and variation.
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 / 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 Method 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 contraceptive implant 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.
After-Period Fertility Calculator
See your fertile window by day based on your cycle and last period.
Frozen Embryo Transfer Date Calculator
Get your transfer date, med milestones, and beta day.
Euploid Embryo Probability (AMH + Age)
Estimate chance of ≥1 euploid embryo from AMH and age.
AMH Levels by Age
Check if your AMH is within the age-matched range.
Beta hCG Level Checker
Compare your value to the expected range for your week.
Beta hCG: How Many Weeks Pregnant?
Estimate your likely week from one value; see typical ranges by week.
hCG Doubling Time: Twins/Triplets
Calculate doubling time for multiples with a 48-hour projection and chart.
Pregnancy Test Line Progression
Chart and compare test lines by date or DPO with projection and verdict.
Birth Probability Calculator
See your estimated percentage chance of giving birth on each day on a calendar
Pregnancy Weight Gain
Calculate your recommended weight gain range based on pre-pregnancy BMI.
Contraction Timer
Track frequency and duration to know when to go to the hospital (5-1-1 Rule).
Baby Eye Color
Predict the probability of your baby having Blue, Green, or Brown eyes.
Baby Blood Type
Find out your baby’s possible blood type based on parent genetics.
Head Circumference
Check your baby’s head growth percentile against WHO charts.
Paternity Estimator
Estimate paternity likelihood based on conception timing.
TSH & Dosage Calc
Interpret thyroid levels and check Levothyroxine dosage charts.
C-Section Timeline
Personalized schedule for driving, lifting & exercise milestones.
Period Return Calculator
Estimate when your cycle returns based on breastfeeding & night feeds.
Live Birth Chance Calculator
Combine miscarriage and stillbirth risk to estimate your chance of live birth from today.
ORPI Calculator
Estimate your Ovarian Response Prediction Index (ORPI) from age, AMH, and AFC to gauge expected ovarian response.
Endometrial Thickness Receptivity Calculator
Interpret uterine lining thickness (mm) to see whether it is typically considered thin, moderate, or more receptive for implantation.
Sperm DNA Fragmentation Risk Calculator
Estimate sperm DNA fragmentation (SDF/DFI) risk using your lab percent, assay, and optional cutoffs.
Embryo Transfer Success Predictor Calculator
Estimate live birth chance from an IVF embryo transfer using age at egg retrieval, embryo day, PGT-A status, and embryos transferred, with 1 to 3 attempt totals.
NIPT PPV and Residual Risk
Interpret a high-, low-, or no-result NIPT for T21, T18, or T13.
Live Birth and Chromosome Risk
Estimate live-birth chance with T21, T18, and T13 context before or after NIPT.
CVS or Amniocentesis After NIPT
Compare procedure-loss and diagnostic-yield context after an NIPT result.
NIPT Redraw Success and Best Date
Estimate redraw success and timing after a no-result NIPT.
Vanishing Twin NIPT Timing
Estimate when NIPT interference from a vanishing twin may be lower.
Early Ultrasound Visibility
Estimate when an early scan may show a sac, yolk sac, or embryo.
Ultrasound Paternity Timing
Compare conception timing with ultrasound dating; timing cannot prove paternity.
Birth Control Switch Protection Gap
Check whether switching methods creates a backup-contraception gap.
Residual hCG or New Pregnancy
Compare serial hCG timing for a falling pattern or possible new rise.
Pregnancy Announcement Risk by Date
Compare miscarriage risk now with a planned announcement date.
Prenatal Testing Timeline
See screening windows and estimated result dates from an EDD.
Nuchal Translucency Reference
Look up expected NT ranges by crown-rump length.
Estimate Nuchal Translucency
Estimate an expected NT measurement from crown-rump length.
Assess Nuchal Translucency
Compare a measured NT with reference percentiles for crown-rump length.
Sperm Quality by Age
Compare age-based semen-quality patterns and optionally add semen-test results.
Family Size Probability
Estimate the chance of reaching a family-size goal from age and timing.
How Many Children Can I Have?
Estimate a distribution for total children from a starting age and timeline.
Children Between Ages
Estimate a distribution for births within an age window.
Abortion Complication Risk
Estimate complication risk by method, timing, and health factors.
Fertility After Abortion
Estimate ovulation and pregnancy-test timing after an abortion.
Negative STI Test Coverage Checker
Compare encounters with STI testing windows, sample dates and relevant body sites.
Sex and Retesting After STI Treatment
See waiting periods and retesting reminders based on treatment, symptoms and partner treatment.
STI Panel Checker
Review selected STI tests and body sites to understand what your report covers.
Pregnancy Dating and Partner Timeline
Compare each partner’s sex dates with an ultrasound-based conception range; timing cannot establish paternity.
Parental Age Risk Calculator
Explore maternal and paternal age associations with chromosome conditions, autism and miscarriage.