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Conception Date Calculator

days

Estimated Conception Date

March 14, 2026

Disclaimer: This information is for educational purposes only. Always consult with a qualified healthcare provider for personalized medical advice regarding your health.

Conception Date Calculator — Overview

A Conception Date Calculator helps estimate the date on which conception most likely occurred. This is useful for understanding the timeline of a pregnancy.

How is it calculated?

It works by taking the first day of your last menstrual period (LMP) and your average cycle length. It then estimates the ovulation date (typically 14 days before the next period starts) and provides a conception window around that date.

Frequently Asked Questions

LMP is the first day of your last period. Conception happens around the time of ovulation, which is typically about two weeks *after* your LMP in a 28-day cycle. Pregnancy is medically counted from the LMP, not the conception date.

No, it provides an estimated window. Sperm can survive in the female reproductive tract for up to five days, so intercourse a few days before ovulation can still lead to conception.

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