There is a high probability that taking progesterone can delay menstruation, but due to individual differences, some people may not be able to achieve the effect of delaying menstruation after using the drug. Menstruation is the symptom of cyclic shedding and bleeding of the uterine lining based on the cyclic changes of the ovaries. Common dosage forms of progesterone, such as tablets and capsules, can help delay menstruation by causing the endometrium to change to the secretory phase, which helps increase the thickness of the endometrium. However, due to the different constitution of individuals, some patients may not be able to achieve the effect of delaying menstruation. Therefore, “taking progesterone to delay menstruation is absolutely effective” does not have scientific basis. Adverse effects such as increased appetite, headache and insomnia may occur in some people. It should be noted that people who are allergic to this product are prohibited. If you need to take progesterone to delay menstruation, you need to go to a regular hospital to consult a doctor, under the guidance of the doctor to use the drug, do not take medication without authorization.