Conception Calculator
The Conception Calculator estimates a range of days during which a woman is most likely to conceive, as well as a corresponding due date based on a woman’s average menstrual cycle.
Important dates for this cycle:
Important dates for the next 6 cycles:
| Period Start | Conception Window | Due Date |
|---|---|---|
| Apr 17, 2025 | Apr 29 – May 4 | Jan 22, 2026 |
| May 15, 2025 | May 27 – Jun 1 | Feb 19, 2026 |
| Jun 12, 2025 | Jun 24 – Jun 29 | Mar 19, 2026 |
| Jul 10, 2025 | Jul 22 – Jul 27 | Apr 16, 2026 |
| Aug 7, 2025 | Aug 19 – Aug 24 | May 14, 2026 |
| Sep 4, 2025 | Sep 16 – Sep 21 | Jun 11, 2026 |
Understanding Your Fertile Window
The fertile window is the 5-6 day period each cycle when conception is most likely, peaking in the 3 days leading up to and including ovulation. Sperm can survive for up to 5 days (sometimes longer), while the egg remains viable for about 12-24 hours after release. By having regular intercourse during this window—especially in the final 3 most fertile days—you maximize your chances of pregnancy (up to 30% per cycle).
Love, Intimacy & Conception
Building a family begins with connection. Stress and busy schedules can dampen intimacy, but regular lovemaking (2-3 times weekly) primes the body for pregnancy by:
- Boosting fertility-linked hormones
- Improving cervical mucus quality (creating a sperm-friendly environment)
- Extending the fertile window naturally
Tracking Your Cycle
Use the calculator above to predict ovulation based on your period and cycle length. For greater precision:
- Basal Body Temperature (BBT): Track morning temps; a slight rise signals ovulation.
- Cervical Mucus: Egg-white consistency appears just before ovulation.
Stress-Free Approach
If charting feels overwhelming, aim for sex every 2-3 days. Sperm longevity means you’ll likely hit fertile days without meticulous tracking. Above all, prioritize joy and closeness—the foundation of conception.
Tip: Combine calculator predictions with body cues for the best results.
(Note: This condensed version keeps key science while emphasising emotional well-being.)