Pregnancy Conception Calculator

Result

Most probable conception dates: Apr 25, 2025 - Apr 29, 2025

Most probable dates of sexual intercourse: Apr 22, 2025 - Apr 29, 2025

Possible conception dates: Apr 22, 2025 - May 2, 2025

Possible dates of sexual intercourse: Apr 17, 2025 - May 2, 2025

These results are estimations only.

About Conception

This calculator estimates the date of conception based on due date, last period, or ultrasound. Conception occurs when a sperm fertilizes an egg, typically 11-21 days after the last period or 266 days before the due date. Sperm can survive 3-5 days, extending possible intercourse dates. Consult a healthcare provider for precise information.

Calculation Methods

  • Due Date: Subtracts 266 days to estimate conception.
  • Last Period: Adds cycle length minus 14 days for ovulation.
  • Ultrasound: Subtracts pregnancy length at ultrasound date.

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Conception Tips

  • Track ovulation using cycle length or ovulation kits.
  • Ultrasounds provide accurate gestational age in early pregnancy.
  • Sperm can survive up to 5 days, affecting conception windows.
  • Consult a doctor for irregular cycles or uncertain dates.

Key Conception Facts

  • Fertilization: Occurs when sperm meets egg in the fallopian tube.
  • Conception: Involves fertilization and implantation in the uterus.
  • Timing: Ovulation typically occurs 11-21 days after last period.