IVF Due Date Calculator Calculate your due date from an embryo transfer date or egg retrieval date, and see your key early milestones — beta hCG, first ultrasound, and beyond. Transfer date Egg retrieval date Embryo transfer date Embryo age at transfer Day 3 (cleavage stage)Day 5 (blastocyst)Day 6 (blastocyst) This applies the same way … Read more
Peak Fertility Day Calculator Pinpoint your single best day to try, by combining your cycle average with any ovulation test, temperature, or cervical mucus signs you’ve tracked. Cycle basics First day of last period Average cycle length Add any signs you’ve tracked Optional — but each one you add sharpens the estimate beyond a plain … Read more
Menstrual Cycle Date Calculator See where you are in your cycle today, and get a forecast of your next several periods, fertile windows, and ovulation dates. First day of your last period Average cycle length Days from the start of one period to the start of the next. Typical period length Number of days you … Read more
Pregnancy Chance Calculator Estimate the likelihood of conception from a specific instance of unprotected sex, based on how close it was to ovulation. I know my ovulation date Estimate from last period Date of intercourse / ejaculation Estimated or confirmed ovulation date From an ovulation test, tracked basal body temperature, or a provider estimate. First … Read more
OPK to Ovulation Calculator Turn your ovulation predictor kit results into an estimated ovulation window, fertile window, and best days to try — or figure out when to start testing in the first place. This tool estimates timing, it doesn’t confirm ovulation. OPKs detect the LH surge that usually precedes ovulation, but the only ways … Read more
Pregnancy Trimester Calculator Find your due date, current week, and trimester — plus a timeline of what’s ahead — from your last period, due date, conception date, or IVF transfer date. Estimates only. Due dates calculated this way are a statistical average — only about 1 in 20 babies actually arrive on the exact predicted … Read more
Based on ultrasound dating Ultrasound Due Date Calculator Enter your scan date and the gestational age your sonographer measured on that day to get an ultrasound-based due date, current gestational age, and progress through pregnancy. Add your last period date too, and it’ll check whether ultrasound or LMP dating should be used, using the same … Read more
Cycle tracking Missed Period Calculator Enter the first day of your last period and your average cycle length to see your expected date, exactly how late you are (if at all), and what’s worth doing next. First day of last period Average cycle length Day 1 of one period to day 1 of the next … Read more
Based on last menstrual period Gestational Age Calculator Enter the first day of your last period to see your current gestational age, trimester, estimated due date, and progress through pregnancy — all calculated using Naegele’s rule. First day of last period Calculate as of defaults to today Average cycle length (optional — refines the due … Read more
Cycle & fertility overview Menstrual Cycle & Fertility Calculator Enter your last period and average cycle length to see which phase you’re in today, your fertility status, this cycle’s key dates, and a forecast for the next three cycles. First day of last period Average cycle length Day 1 of one period to day 1 … Read more