There are different cases of irregular periods, and the effect of different cases on pregnancy is also different, and should be analyzed on a case-by-case basis: 1. For lighter cases of irregular periods, that is, women have abnormal periods that are short in frequency and duration, and basically do not affect the formation of normal menstruation significantly. In this case, it will not affect the woman’s ability to conceive, as long as she can form normal eggs. 2. For the more severe cases of irregular periods, women often have irregular periods and the periods last for a long time, in which case they are often unable to form normal eggs. These women also have abnormal endocrine function and the eggs produced are not of high quality.