Ovulation Day for a 28-day Cycle When the Last Period Started on December 01, 2025

⚪ Ovulation day (highest chance for pregnant) is:

2025-12-15 (Monday)

📅 Fertile window: Dec 11 - Dec 16

Thu Fri Sat Sun Mon Tue
Dec 11 Dec 12 Dec 13 Dec 14 Dec 15 Dec 16
👦 👦 👦/👧 👧 👧 👧

Pregnacy test day: Dec 30 2025
💡 According to recent studies, the chance of conception during ovulation is about 25%. Therefore, do not worry when the test comes out negative. Another chance is just a month of waiting.

If pregnant:
🤱 Due date: Sep 07 2026 (Monday)

If not pregnant.
🩸 Next period: Dec 29 2025
⚪ Next ovulation: Jan 12 2026

Nearest days of ovulation for a 28-day cycle

The closest calculation of the day of ovulation for different cycle lengths when the first day of the period was December 1, 2025