A woman’s ovulation period is based on her menstrual cycle, which can be calculated from 14 days before the next menstrual period. Irregular menstrual cycles can be calculated based on the usual long and short menstrual cycles.
The usual regular menstrual cycle, 14 days before the next menstrual period belongs to the day of ovulation, 5 days before and 4 days after the day of ovulation belongs to the period of ovulation, which is usually about 10 days.
Usually the menstrual cycle is not regular, according to the previous 6 to 12 months of menstruation, the first to understand their longer menstrual cycle time and shorter menstrual cycle time, the first day of ovulation is the shorter menstrual cycle minus 18, the last day of ovulation is the longer menstrual cycle minus 11, to get out of is the time of ovulation.
It is not always accurate to know the time of ovulation by projection, but you can also use ovulation test paper, ultrasound monitoring, basal body temperature test and other ways to know the ovulation period. For more information, please consult your doctor.