Conception → Due Date

Predicted periods, ovulation window, and due date — all from the same last-period date and cycle length.

Predicted periods, ovulation window, and due date — all from the same last-period date and cycle length.

First Day of Last Period

Period Duration (days)

Average Cycle Length (days)

Next Periods

Next: Thu Jan 29 2026 – Mon Feb 02 2026

Fertile Window

Ovulation ~Thu Jan 15 2026 (fertile Sun Jan 11 2026 – Mon Jan 19 2026)

Estimated Due Date

Thu Oct 08 2026