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Pregnancy Conception Calculator

Estimate your likely conception date based on your last menstrual period.

Estimated Conception Window

Estimated Ovulation Date-
Likely Conception Window-

How to Use the Pregnancy Conception Calculator

  1. Enter the first day of your last menstrual period.
  2. Enter your average cycle length (default 28 days).
  3. Click Calculate to see your likely conception window.

What is a Conception Calculator?

A conception calculator estimates the likely window when conception occurred, based on ovulation timing relative to your last menstrual period.

This is an estimate for informational purposes only. Consult your doctor for medical guidance.

Frequently Asked Questions

How is ovulation estimated?

Ovulation typically occurs about 14 days before the next period, which is calculated from your cycle length.