One of the main symptoms of PCOS is irregular periods. Women with PCOS may have periods that are infrequent, long, or heavy. They may also skip periods altogether. In some cases, women with PCOS may have periods every 17 days. However, there are other possible causes of short cycles, such as luteal phase defect, hyperthyroidism, and stress
It is important to note that having cycles every 17 days alone does not necessarily mean that you have PCOS. Many other factors, such as stress, diet, and lifestyle, can also affect the length of your menstrual cycle. If you are concerned about your menstrual cycle, it is important to talk to your doctor.