Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 12/7/2025

Optimizing Conception Probability

Cumulative Pregnancy Rates Over Time

  • Approximately 85% of couples will achieve pregnancy within 1 year when not using contraception and trying to conceive, as recommended by the Centers for Disease Control and Prevention 1, 2

Critical Factors That Maximize Conception Probability

  • To maximize conception likelihood, intercourse should occur every 1-2 days beginning soon after the menstrual period ends, as suggested by the Centers for Disease Control and Prevention 3

Practical Recommendations for Maximizing Conception

  • Having intercourse every 1-2 days during the fertile window, rather than trying to pinpoint a single day, is recommended by the Centers for Disease Control and Prevention to maximize conception probability 3
  • For cycles shorter than 26 days, the fertile window shifts earlier, and using urinary ovulation predictor kits can help identify the LH surge, which precedes ovulation by 24-36 hours, as noted by the American Society for Reproductive Medicine, although the specific citation is from Praxis Medical Insights, an alternative source is not provided 4

REFERENCES

4

Optimal Fertilization Timing [LINK]

Praxis Medical Insights: Practical Summaries of Clinical Guidelines, 2025