A 32-day menstrual cycle with a regular menstrual cycle usually results in follicle discharge on the 18th day. The menstrual cycle refers to the period of time between the start of the current period and the start of the next period. For a woman with a 32-day menstrual cycle, if her periods are regular, the follicle will be discharged 14 days before the next period, i.e. ovulation will occur on the 18th day after the current period. For example, if your period comes on the 10th of the month, and your menstrual cycle is 32 days long and regular, you should ovulate on the 10th+32-14th=28th, i.e., you will ovulate on the 28th of the month. If the menstrual cycle is not regular, this algorithm can not be used, you can use the method of measuring basal body temperature or ovulation test paper to measure.