When is your fertile window?
Enter your last period and your average cycle length — no sign-up needed.
Cycles vary from month to month. Your body's signs and tests are still the most reliable way to confirm.
Estimated from your cycle length: ovulation usually happens about 14 days before your next period, and the fertile window covers the 5 days before ovulation up to the day itself. Irregular cycles make this less accurate — if that's your case, it's worth talking to whoever looks after your health. Nothing is saved unless you tap “Save to my journey”.
Want to keep following this stage?
Create your free account to follow your journey on the website and in the app. This result is not saved automatically.
Nilu grows with its community.
Nilu is independent and free. If it helped you, support it once with any amount from R$ 1 via Pix and help more families use the tools and content.