How long does it take for a 1.8 cm × 1.8 cm follicle to ovulate?

A follicle that has developed to 1.8 cm × 1.8 cm has reached maturity and typically ovulates within 24–48 hours. However, the exact timing of ovulation may vary due to hormonal levels and individual physical conditions, so it is advisable to assess ovulation using symptoms or monitoring methods. Detailed analysis is as follows:

A follicle measuring 1.8 cm × 1.8 cm is considered a dominant mature follicle. At this stage, the follicular wall gradually thins and ruptures under the influence of the luteinizing hormone (LH) surge. Most women will ovulate within 24 hours at this stage, while some with slower hormonal fluctuations may ovulate up to 48 hours later—both scenarios fall within the normal physiological range.

Ovulation timing can be supported by observing physical symptoms. Prior to ovulation, women may notice clear, stretchy cervical mucus resembling egg whites, mild lower abdominal heaviness, or slight one-sided pelvic discomfort. For more precise detection of ovulation timing, ovulation test strips can be used. A transition from strong positive to weak positive on the test strip usually indicates imminent ovulation.

Women who are trying to conceive should plan intercourse appropriately during this period to increase the chances of pregnancy. Additionally, maintaining a regular sleep schedule, avoiding late nights and excessive fatigue, consuming a balanced diet, and sustaining stable hormone levels can create favorable conditions for normal ovulation and healthy oocyte development.