Progesterone is able to delay menstruation, but this delay is determined by each individual’s body type. Because progesterone is a progestin that helps the endometrium to grow all the time, you may not experience a period as long as you do not stop taking the medication. However, some people are not disturbed by progesterone and will still have a period when it is due. Therefore, when this happens, it is important to stop the medication immediately so that it does not cause an increase in menstrual flow after taking the medication. Also, progesterone is a hormonal drug and it is not recommended to delay menstruation for a long time. It may cause some adverse reactions, such as dizziness, headache, and even low menstrual flow, which may cause menstrual cycle disorders.