Today
Day — of —
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Has your period started? Your period was expected —. Enter the first day of it so your cycle stays accurate — or take a test if it hasn't arrived.
Your cycle
Enter the first day of your last period and we'll show today's phase, your fertile window, and when to expect your next period. Add a morning temperature each day (or your Oura ring's reading) to confirm ovulation. Everything stays in this browser — nothing is sent anywhere.
Morning temperature
No readings yetLog each morning's reading (or your Oura ring's nightly temperature). A sustained rise of about 0.2 °C confirms ovulation, and over a few cycles we learn your own rhythm.
This cycle
Period
Follicular
Fertile window
Luteal
◆Ovulation
Pregnancy test possible
Key dates
Next six cycles
Fertile window and, if you conceived that cycle, the due date and baby's sign.