When is the ovulation day after menstruation?

The ovulation day can be calculated based on menstrual cycles, but the calculation method may vary among different women. For women with stable menstrual cycles, the ovulation day typically occurs on the 14th day before the next menstrual period. For women with irregular menstrual cycles, the ovulation day starts from the day when the shortest menstrual cycle is subtracted by 18 days.

1.1 For women with stable menstrual cycles, the ovulation day is usually the 14th day before the next menstrual period. The five days before this day, including the day itself and the four days after, are referred to as the ovulation period. In general, the ovulation period for women is ten days.

1.2 If the menstrual cycle is irregular, the first day of the ovulation period is calculated by subtracting 18 days from the shortest menstrual cycle, and the last day is calculated by subtracting 11 days from the longest menstrual cycle. The calculation is based on the first day of the current menstrual period.

Cervical mucus appears throughout the menstrual cycle and undergoes subtle periodic changes. After menstruation, the secretion of mucus gradually increases and becomes thinner and transparent, similar to egg white. It reaches its peak before ovulation, and the day with the highest amount of mucus has the highest probability of ovulation. At this time, by inserting a finger into the deep part of the vagina and dipping some mucus from the cervix, the mucus can be stretched into a thin filament up to 10 centimeters without breaking.

After ovulation, under the influence of progesterone, the secretion of mucus decreases significantly, becoming thicker, cloudy, and less elastic, making it easy to break when stretched. By observing and recording the state of mucus every night and understanding the pattern of its changes, you can easily identify your ovulation day.