After a biochemical pregnancy, the next period comes about 1 month later, or at the same time as your own period before the pregnancy. Biochemical pregnancy itself does not affect the timing of a woman’s next period. The timing of a woman’s period after a biochemical pregnancy is still related to her original menstrual cycle. Women who have regular menstrual cycles usually have their next menstrual period in about one month after a biological pregnancy. However, if the patient’s menstrual situation is not regular, the time of coming is not always certain, and most of the time is the same as the time of their own menstruation before the biochemical pregnancy. For example, if a patient with polycystic ovary syndrome (PCOS) has a period that is often delayed or even absent, then after a biochemical pregnancy, the period will still be delayed or absent.