admin Days past ovulation DPO Calculator Enter your ovulation date to find out exactly how many days past ovulation (DPO) you are today, along with your implantation window, testing timeline, and expected period date. Ovulation date Calculate for defaults to today Calculate my DPO — — Implantation window — Expected period — Testing timeline Earliest possible … Read more
When to test, and how confident to be in the result Pregnancy Test Calculator Fill in whatever you know — your last period, an ovulation date, or the date you had intercourse — and this works out your estimated ovulation, implantation window, and the earliest, recommended, and most reliable days to take a test. First … Read more
For parents & caregivers Breastfeeding Eligibility & Risk Calculator Answer a few questions about you and your baby. You’ll get a plain-language summary of which topics are safe to set aside and which ones are worth raising with your doctor, midwife, or lactation consultant. About your baby My baby has been diagnosed with classic galactosemia … Read more
Family size probability calculator A statistics tool for a fun family-planning question: if you have a certain number of children, what are the odds of a particular mix of boys and girls? This uses basic probability, not biology — real pregnancies aren’t perfectly independent coin flips, but the math gives a reasonable, widely used approximation. … Read more
Irregular period pregnancy chance calculator A pregnancy chance calculator built specifically for irregular cycles. Instead of assuming a fixed 28-day cycle, it uses the range across your recent cycle lengths to estimate a fertile window, and shows how the timing of intercourse relative to that window affects your odds this cycle. Your recent cycles Last … Read more
Educational screening tool only. This calculator cannot diagnose ectopic pregnancy and does not replace an hCG blood test or ultrasound. Ectopic pregnancy can occur even with no risk factors at all — use this to organize your history for a conversation with a clinician, not to rule anything in or out on your own. Ectopic … Read more
Recurrent miscarriage risk calculator A worksheet to help you understand where you sit relative to common thresholds for recurrent pregnancy loss evaluation, and to prepare questions for your clinician — including what the evidence suggests about miscarriage risk after 2 miscarriages or more. Your history Current age Number of previous miscarriages 01234 or more Most … Read more
CRL calculator Estimate gestational age and due date from a first-trimester crown-rump length measurement, using the Robinson & Fleming formula. Crown-rump length (mm) Most reliable between 10 mm and 84 mm (roughly 6+0 to 13+6 weeks). Scan date Date the ultrasound measurement was taken. This measurement is outside the range where the Robinson & Fleming … Read more
Placenta Accreta Spectrum risk estimator A history- and imaging-based worksheet to help stratify PAS risk. Built from published associations between placenta previa, prior cesarean count, and adjunct risk factors. Intended to support, not replace, clinical and radiologic judgment. Obstetric history Number of prior cesarean deliveries 012345 or more History of placenta accreta spectrum in a … Read more
How effective is your method? Select one or more contraceptive methods to compare how many pregnancies typically occur per 100 users in a year, with typical use versus perfect use. Your comparison Numbers show pregnancies per 100 people using the method for one year. About these numbers. Rates reflect commonly cited U.S. clinical research on … Read more