Fertility & Pregnancy

BBT Calculator

Use this basal body temperature calculator to adjust a BBT reading for wake-time differences, compare it with ovulation chart ranges.

Birth Control Calculator

Use this birth control calculator to compare birth control effectiveness, pregnancies per 100 users per year, multi-year pregnancy risk, STI notes.

Clomid Ovulation Calculator

Estimate likely ovulation timing, OPK start, fertile days.

Conception Calculator

Estimate conception date and fertile window from last menstrual period, cycle length, luteal phase, known due date, known conception date.

Due Date Calculator

Estimate pregnancy due date from last period, conception date, a known estimated due date, or a dating scan, with gestational age, trimester.

Egg Freezing Calculator

Estimate how many mature eggs may need to be frozen for one or more future births, with age-based success assumptions, confidence-target planning.

Fertility by Age Calculator

Estimate age-based conception chances per cycle and over 3, 6, 12, and 24 months, with even-chance timing, miscarriage-risk context.

Fertility Calculator

Estimate your fertile window, most fertile days, ovulation timing, LH-test start, next period, cycle-length shifts.

Gestational Age Calculator

Estimate gestational age in weeks and days from last menstrual period, due date, conception date, or dating scan timing, with milestone scheduling.

hCG Levels Calculator

Interpret a pregnancy hCG value against gestational-age reference ranges, estimate beta hCG doubling or falling trends from two measurements.

Implantation Calculator

Estimate when implantation may happen after ovulation, current DPO, or cycle-based timing, then compare the likely implantation window.

IVF Due Date Calculator

Calculate an IVF transfer-based due date from embryo transfer date and embryo age, then review gestational age, gestational age at transfer, equivalent LMP.

Luteal Phase Calculator

Calculate luteal phase length from cycle and ovulation inputs, with fertile-window timing, next-period estimation, and short-phase medical follow-up context.

Ovulation Calculator

Use this ovulation calculator to estimate ovulation day, fertile window, most fertile days, LH-testing start, milestone dates, common-cycle comparisons.

Period Calculator

Predict upcoming period start and end dates, ovulation days, and fertile windows from your last period date, cycle length, and period duration.

Pregnancy Date Calculator

Estimate due date, reverse due date, pregnancy week, gestational age, conception timing, ovulation timing, period timing.

Pregnancy Test Calculator

Find when to take a pregnancy test after ovulation, current DPO, or your last period, with implantation context, reliable missed-period checks.

Pregnancy Weeks Calculator

Calculate how many weeks pregnant you are from your last period or due date, with trimester, fetal-age, milestone, and weeks-remaining context.

Pregnancy Weight Gain Calculator

Estimate pregnancy weight-gain targets from pre-pregnancy BMI, then compare singleton-versus-twin ranges, trimester checkpoints.

Reverse Due Date Calculator

Work backwards from a due date, dating scan, or birth date to estimate likely conception timing, the last menstrual period, testing checkpoints.

Sperm Analysis Calculator

Interpret semen analysis values against WHO 2021 reference limits, estimate total count plus total and progressive motile sperm counts.