Gynecology Pregnancy calculators
35 calculators Conception Calculator Estimate your conception date from your last period, due date, ultrasound, or IVF transfer, with a conception window, fertile days, and how far along you are now.
Open Due Date Calculator Estimate your pregnancy due date from your last period, conception date, IVF transfer or ultrasound. See how many weeks along you are, your trimester and milestones.
Open Gestational Age Calculator Find gestational age in weeks and days from LMP, conception, IVF transfer, ultrasound, or a known due date. See trimester, conception date, due date, and milestone dates.
Open Ovulation Calculator Find your ovulation day, fertile window, best days to conceive, when to test, and the due date if you conceive, plus a multi-cycle fertility calendar.
Open Period Calculator Predict your next periods with start and end dates, ovulation day and fertile window. Project several cycles ahead and solve cycle length from two real dates.
Open Pregnancy Weight Gain Calculator See your recommended pregnancy weight gain by pre-pregnancy BMI using IOM/NASEM guidelines, your on-track range and projected weight this week, for one baby or twins.
Open BBT Calculator - Basal Body Temperature & Ovulation Adjust your BBT for wake-time offset, calculate the FAM coverline from pre-ovulation readings, detect a thermal shift, and identify your fertile window.
Open Birth Control Effectiveness Calculator Compare contraceptive effectiveness (typical vs. perfect use), pregnancy risk over any timeframe, Pearl Index, and annual cost for 16+ methods side by side.
Open Bishop Score Calculator Calculate the Bishop score for labor induction readiness. Enter all five cervical exam findings for an instant score with interpretation and clinical guidance.
Open Breast Cancer Recurrence Risk Calculator (NPI) Calculate your Nottingham Prognostic Index (NPI) score for breast cancer prognosis. Get your 5-year and 10-year survival estimates and risk group instantly.
Open Breast Cancer Risk Calculator (Gail Model) Estimate your 5-year and lifetime breast cancer risk using the NCI Gail Model. Enter age, family history, biopsy results, and more. Instant, evidence-based results.
Open Breastfeeding Calorie Calculator Calculate how many calories you need while breastfeeding. Adjusts for your age, weight, height, activity level, lactation phase, and weight goal. Free and instant.
Open Chances of Having Twins Calculator Estimate your probability of conceiving twins using age, fertility treatment, family history, BMI, height, and ancestry. See fraternal vs. identical odds instantly.
Open Clomid Ovulation Calculator Find your ovulation date, peak fertility window, implantation window, and best days to conceive after Clomid or Letrozole. Free, instant, research-backed.
Open Crown-Rump Length (CRL) Calculator Calculate gestational age from ultrasound CRL measurement, or find expected CRL for any week. Includes due date estimate, normal CRL ranges and worked formula.
Open EDD Calculator: Estimated Date of Delivery Calculate your Estimated Date of Delivery (EDD) from LMP, ultrasound, IVF transfer, or conception date. See trimester dates, gestational age, and key milestones.
Open Egg Freezing Calculator Estimate live-birth probability from frozen eggs by age and egg count. Get personalized success-rate projections for 1, 2, or 3 children based on current clinic data.
Open Breast Pump Flange Size Calculator Enter your nipple diameter to get your recommended breast pump flange size in seconds. Includes a brand size chart, fit tips, and signs of a wrong-size flange.
Open Fundal Height Calculator: SFH by Week, Fetal Weight Estimate Check your symphysis-fundal height (SFH) against gestational age percentiles, detect small or large for dates, and estimate fetal weight using Johnson's formula.
Open hCG Levels Calculator Calculate your beta-hCG doubling time from two blood draws, or compare a single hCG result to the normal reference range for your week of pregnancy.
Open Implantation Calculator Find your implantation window, most likely implantation day, and earliest pregnancy test date. Works for natural cycles and IVF embryo transfers.
Open IVF Due Date Calculator Calculate your IVF or FET due date from your embryo transfer date. Supports day-3, day-5, day-6, and egg retrieval, with trimester dates and milestones.
Open Luteal Phase Calculator Calculate your luteal phase length from your ovulation date and next period, or estimate it from your last period and cycle length. Normal, short, or long?
Open MCA-PSV Calculator - Fetal Anemia Risk Calculate MCA peak systolic velocity MoM to screen for fetal anemia. Enter gestational age and observed PSV to get the median, MoM, and clinical interpretation.
Open Mean Sac Diameter Calculator Calculate mean sac diameter from three ultrasound measurements and estimate gestational age in weeks and days. Includes a reference table, due date, and accuracy notes.
Open Nuchal Translucency Calculator Calculate the nuchal translucency percentile, MoM, gestational age from CRL, and adjusted trisomy 21 risk. Free, accurate, and instant results.
Open Pearl Index Calculator Calculate the Pearl Index for a contraceptive study from women, months, and pregnancies to get the failure rate per 100 woman-years, with method comparisons.
Open Pregnancy Test Calculator Find the earliest day to take a pregnancy test by cycle or IVF transfer date. See hCG levels by DPO, test brand sensitivity, and a week-by-week reference chart.
Open Progesterone to Estrogen Ratio Calculator Work out your progesterone-to-estrogen (Pg/E2) ratio from lab values in any unit. Converts units for you and shows where the result sits on the quoted 100-500 scale.
Open Reverse Due Date Calculator Enter your due date or birthday and instantly find the estimated conception date, the intercourse window, and key pregnancy milestones on a week-by-week timeline.
Open Sperm Analysis Calculator Interpret semen analysis results with WHO 6th Edition (2021) reference values. Calculates total sperm count, TMSC, and functional sperm, and flags abnormalities.
Open Stillbirth Risk Calculator Estimate stillbirth risk based on maternal age, BMI, ethnicity, obstetric history, and medical conditions. Uses peer-reviewed odds ratios. Results are educational only.
Open Testosterone to Estradiol Ratio Calculator Calculate your testosterone to estradiol (T/E2) ratio with unit conversion between ng/dL, nmol/L, pg/mL, and pmol/L, plus hormone reference ranges.
Open VBAC Calculator (Vaginal Birth After Cesarean) Estimate VBAC success odds with the 2021 race-free Grobman model and the Flamm intrapartum score. Enter age, height, weight and obstetric history for instant results.
Open VTE Risk Score Calculator in Pregnancy (RCOG) Calculate your VTE risk score in pregnancy using the RCOG Green-top Guideline No. 37a. Get antepartum and postpartum thromboprophylaxis recommendations instantly.
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