Calculate the likely conception date and fertile window based on due date or birth date.
Enter a date to calculate conception timeline
Conception typically occurs during ovulation, about 14 days after the last menstrual period in a 28-day cycle.
Sperm can survive up to 5 days, and the egg survives about 24 hours, creating a 6-day fertile window.
These calculations are estimates. Actual conception can vary based on cycle length and individual factors.