The menstrual cycle 26 days, 21 days before the follicle is not normal, belong to the delayed ovulation, under normal circumstances, ovulation is usually in the 12th day of the menstrual cycle. Women usually menstrual cycle is more regular, menstrual cycle is accurate 26 days, ovulation in the menstrual cycle on the 12th day, this time the follicle rupture is normal, 21 days before the follicle broken is delayed. Ovulation calculation should be pushed backwards, usually irregular menstrual cycle, due to the length of the first half of the cycle, the time of ovulation will be irregular, a part of the women due to the follicle development is slower, ovulation will be delayed accordingly. If you want to prepare for pregnancy, you need to monitor your follicle development first to know the exact number of dominant follicles and the time of ovulation, and then arrange intercourse after the mature follicles are discharged, so that your chance of getting pregnant will be greater. Women can go to the hospital to find out whether their menstrual cycle and ovulation are normal.