Regular vacation refers to menstruation. If your child wants to delay menstruation for the college entrance examination, you can take progesterone capsules and dydrogesterone under the guidance of your doctor. 1. Progesterone capsule: the process of women’s menstruation is the process of shedding of the uterine lining, and after the hormone level drops, it can’t support the growth of the uterine lining, so it will come to menstruation. The main ingredient of progesterone capsules is progesterone, which can maintain the growth of the endometrium and delay menstruation. But there may be adverse reactions, such as breakthrough bleeding, vaginal spotting, weight gain or loss, dizziness, headache, nausea, fever, insomnia, rash, etc. Those who are allergic to progesterone should not use it, and those who have unexplained vaginal bleeding should not use it. 2. Dydrogesterone: Dydrogesterone is also a progestin drug, the principle of delaying menstruation is the same as progesterone capsules, which can be taken a few days before menstruation. This drug may also have some side effects, such as allergy, headache, abnormal liver function, irregular uterine bleeding, breast pain, etc. Patients who are allergic to this ingredient, have progesterone-dependent tumors, or have unexplained vaginal bleeding cannot use it. Children to college entrance exams, want to delay menstruation, should be under the guidance of the doctor to choose the appropriate drugs, the above drugs should be used in accordance with medical advice to avoid adverse reactions.