Women's Health Calculators
Private, in-browser estimates built on clinical guidelines from ACOG, WHO, and SART. Your entered reproductive entries are computed locally and are never stored or transmitted.
Cycle & Ovulation
Period Predictor
Forecast your upcoming 3 to 6 menstrual cycle start dates and bleeding lengths based on your historical cycle length.
Ovulation & Fertile Window
Identify your estimated 6-day fertile window and peak probability days using luteal phase reverse calculation.
Cycle Regularity Stats
Calculate your true average cycle length and evaluate cycle-to-cycle variance against FIGO clinical guidelines.
Pregnancy & Due Dates
Pregnancy Due Date Estimator
Calculate your estimated delivery date (EDD) and current gestational age using LMP or verified conception date.
Weeks to Months Converter
Translate obstetric gestational weeks into calendar and lunar months, with trimester milestone breakdowns.
Conception Date Estimator
Reverse-engineer the probable conception window and sexual intercourse window from your confirmed due date.
Ultrasound Scan Dating
Adjust your expected delivery date based on a crown-rump length (CRL) or biparietal diameter ultrasound scan report.
Fertility & Early Detection
Implantation Window Timing
Estimate the 6 to 12 DPO window when a blastocyst attaches to the uterine endometrium, highlighting peak probability days.
Pregnancy Test Timing
Determine the optimal testing date based on home urine test sensitivity to prevent false-negative results.
IVF / FET Due Date
Precision pregnancy dating for assisted reproductive technology: Day 3, Day 5 blastocyst, Day 6 FET, or retrieval.
hCG Doubling Rate-of-Change
Quantify human chorionic gonadotropin rise time (doubling hours and percent increase) across serial blood draws.