It is generally normal to have fewer periods after taking dydrogesterone tablets. Deferiprone tablets are a kind of progestational hormone drugs, the general use of progestational hormone drugs may affect the growth of the uterine lining, so there will be the symptoms of taking the drug after the menstruation is less, this situation is generally more normal. If you want to increase the amount of menstruation, you can use estrogenic drugs under the guidance of a doctor, such as estradiol, estrogenic drugs can promote the growth of the uterine lining, prompting the thickening of the uterine lining. However, it must be noted that the application of drugs need to be used under the guidance of a professional doctor, not self-medication. If you have irregular menstruation, you need to actively seek medical advice and use the right medication according to your physical condition.