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
Reviewed by Dr. Sony Sherpa, MBBS, MD on Dec 22, 2025 Use this calculator to estimate twin odds for one pregnancy. Use the Optional details section to get more precise results. Female age Prior births Family history of twins NoYes (maternal side)Yes (paternal side)Yes (both sides) Have you had twins before? NoYes Fertility treatment None … Read more
Enter cycle timing and bleeding details to compare implantation spotting with a period and see when to take a pregnancy test. Timing Do you know your ovulation date? NoYes Start date of your last period (LMP) Average cycle length (days) Ovulation date Bleeding started on Bleeding details Pattern (pick the closest) Only when wipingSpotting on … Read more
Estimate your chance of pregnancy from a single encounter using the withdrawal method (sometimes called the ‘pull-out’ method). This simple calculator uses cycle timing and whether use was typical vs perfect. Contraceptive: Withdrawal (pull out method) Do you use this method perfectly? NoYes Date of Intercourse Start Date of Your Last Period Average Cycle Length … Read more
Trying to understand your odds of pregnancy while on the pill? Get a quick, baseline estimate in seconds. Contraceptive: The Pill Do you use this method perfectly? NoYes Date of Intercourse Start Date of Your Last Period Average Cycle Length (Days) Additional Contraceptives (optional) Second method — None —Male CondomCombined pill (the pill)Female sterilizationMale sterilizationWithdrawal … Read more
Use this calculator to estimate your chance of pregnancy from an encounter where a condom was used. Choose whether it was perfect or typical use, then (optionally) add a second method. Your result is per-act, based on peer-reviewed effectiveness data and our modelling. It’s not medical advice—just a clear way to put numbers to a … Read more
Reviewed by Dr. Grace Ramosena, MBChB on Jan 25, 2026 Use this hCG calculator with at least 2 beta-hCG blood test results to estimate doubling time or halving time, compare your rise with typical early-pregnancy ranges, and view a chart. hCG Draw 1 Date and time hCG (IU/L) hCG Draw 2 Date and time hCG … Read more
See how levonorgestrel emergency contraceptive pills compare with ulipristal acetate emergency contraceptive pills by hours since intercourse, weight/height, and number of encounters. Get your estimated pregnancy chance and your first accurate test day. Method Levonorgestrel (LNG)Ulipristal acetate (UPA) Hours since intercourse Enter a number from 0 to 168. Female age Advanced options Number of intercourse … Read more
Enter the pill type, the timing of the missed dose and intercourse, and any emergency contraception to see an estimated pregnancy chance, a broad model range, next-step guidance, and a pregnancy-test date. Pill type ? Choose Combined or POP. If you choose POP, a second field asks which formulation because missed-dose windows differ. Combined pillProgestin-only … Read more