How early in your cycle can you conceive?

You can conceive any day during your menstrual cycle, even if you don't have a period. However, the most likely days to get pregnant are ovulating and in the days leading up to ovulation. ovulation usually occurs 14 days before the start of your next period. So if you have a 28-day cycle, you will ovulate on day 14. The most fertile window is in the 6 days before ovulation and the day of ovulation.