It is true that people who have irregular periods, also known as menstruation, are less likely to get pregnant. This is because irregular periods can be the cause of early, delayed or even no ovulation resulting in a lower probability of pregnancy. Pregnancy requires a sperm to combine with a mature egg to form a fertilized egg, and the fertilized egg will not become pregnant until it has implanted in the womb. Normal women of childbearing age usually excrete a mature egg every month, and the day of ovulation is usually 2 weeks before the next menstrual period, so if you have intercourse during the ovulation period, you can increase your chances of getting pregnant. However, if a woman’s menstrual cycle is irregular and disorganized, ovulation may occur earlier or later. Since it is difficult to detect whether the follicle has matured, the probability of pregnancy will be reduced if intercourse is not performed during ovulation. If a woman is ready to get pregnant but has irregular periods, she should seek medical attention and treatment.