Estimate your per-cycle chance using age, time trying, intercourse frequency, known factors, and recent contraception. See a 3, 6, and 12 cycle timeline, the cycles to reach 50% and 80%, and when to consider a fertility work-up. Female age Male age (optional) Average cycle length (days) Trying so far MonthsCycles Enter whole numbers if possible. … Read more

Estimate your ovulation window with PCOS using period history or irregular cycles plus signs like OPK, cervical mucus, and BBT. See probability bands (ovulating now/soon/unlikely), the best next two days to try, when to test, and a tip to confirm if unsure. Last period start date Irregular or no period Leave blank if you do … Read more

Estimate your next period from your last period date and average cycle length, with a window of at least 3 days. You also get two later start dates, your current cycle day, late status, and suggested pregnancy-test timing if late. Last period start date Enter the first day of your last period. Future dates are … Read more

Vasectomy is very effective, but failures can happen—most early (before semen analysis is clear) and rarely years later from recanalization. This calculator estimates annual and cumulative risk bands using your procedure type and time since surgery. It’s educational only; if your partner’s period is late, test early and speak with a clinician. Months since vasectomy … Read more

Tubal ligation is very effective, but failures can occur—and when they do, ectopic pregnancy is more likely. This calculator estimates your annual and cumulative risk bands based on procedure type, time since surgery, and whether a reversal was done. Use it for education only; if you have pregnancy symptoms, test early and contact a clinician. … Read more

Use this calculator to estimate when you’re most likely to ovulate after a cycle of clomiphene (e.g. Clomid) or Letrozole (e.g. Femara). Enter your regimen and last pill date to get a likely ovulation window, the earliest reliable test day, and an estimated due date if you conceive. Educational only—timing varies and clinical monitoring is … Read more

Enter the time of your first positive OPK and your typical surge length. This calculator estimates your ovulation window, the best days to try, and the first reliable pregnancy test day. Date of first positive OPK Time of first positive (approx.) Your typical surge length About 24–36 hoursAbout 12 hours (short)About 36–48 hours (long)Not sure … Read more

Compare illustrative pregnancy and cycle-variation estimates using your cycle information, possible sperm exposure and pregnancy tests. See what the results mean and when to test or retest. Not sure when your period is due next? The next period calculator predicts your upcoming date and test day. Average cycle length (days) Count from the first day … Read more

Check if you meet LAM (Lactational Amenorrhea Method) criteria while breastfeeding. Enter baby’s age, feeding pattern, night feeds, and period status to see if LAM applies, how effective it is, and when to switch methods. Baby’s age (months) Exclusive breastfeeding (%) 100% Approximate how much of baby’s intake is breast milk (no regular formula/solids = … Read more

Estimate your IUI pregnancy chance using age, trigger use, semen quality, and which attempt you are on. See the per-cycle estimate and cumulative chances across the first three IUIs. Female Age IUIs this cycle Single IUIDouble IUI (two inseminations this cycle) Semen Quality (quick) Auto — use detailed values if enteredNormal parametersLow count/motility Tip: leave … Read more