When in my cycle is it easiest and hardest to get pregnant?

Ovulation: During a menstrual cycle there is a 24 hour time window during which a woman can conceive. That window is at "cycle length minus 14". In a 28 day cycle this would be day 14, in a 26 day cycle, day 12. A woman will need to monitor the length of her cycles over 6 - 12 months to get an idea, what the variation in the length of her cycles is. Have intercourse every other day day 7 - 14.