Best Days to Get Pregnant: Understanding Your Fertile Window

By Ovuloom Team | May 17, 2025 | 7 min read
Fertility and conception timing illustration

If you're trying to conceive, timing is everything. Unlike men, who are fertile every day, women have a brief window each month when pregnancy is possible. This is called the Fertile Window.

The 6-Day Rule

Your fertile window lasts for about 6 days:

Why this specific timing? Because sperm can survive inside the female body for up to 5 days, waiting for the egg to be released. However, the egg itself only lives for 12-24 hours after ovulation. If it's not fertilized in that short window, it disintegrates.

Visualization of a Typical 28-Day Cycle

If you ovulate on Day 14, your best days to try are Days 9, 10, 11, 12, 13, and 14.

Day 8
Low
Day 9
High
Day 10
High
Day 11
High
Day 12
High
Day 13
Very High
Day 14
PEAK
Day 15
Low

Which Days Are Absolute Best?

Research suggests that the two days before ovulation and the day of ovulation offer the highest probability of conception.

How Frequency Matters

You don't need to have sex every single day of the window. Every other day is often sufficient to ensure fresh sperm is waiting for the egg. However, aiming for the peak days is a smart strategy.

What If My Cycle Isn't 28 Days?

This is where it gets tricky. Most women do not have a perfect 28-day cycle. If you have a 32-day cycle, you likely ovulate around Day 18, not Day 14. If you rely on generic calendars, you might be missing your window entirely!

This is why tracking your personal biological signs (like with the Ovuloom app) is far more effective than simply counting days on a calendar.

Find YOUR Unique Fertile Window

Don't guess. Let Ovuloom's smart algorithm calculate your personal best days to conceive.

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