If you are a woman of childbearing age and are not using effective contraception, you should consider whether the delay in menstruation for 10 days is due to pregnancy, and you can go to the hospital for a blood HCG test to rule out whether the delay in menstruation is due to pregnancy. If it is not due to pregnancy, an ultrasound should be performed to find out the thickness of the uterine adnexa and the lining of the uterus. If the thickness of endometrium is more than 1.0cm, progesterone can be given orally, and in general, 100mg of progesterone can be given twice a day for 5-10 consecutive days, and withdrawal bleeding, which is the onset of menstruation, will occur 3-7 days after stopping the medication. Women should abstain from eating cold, spicy and stimulating food before and after menstruation, should not do strenuous exercise, and should keep the vulva clean and hygienic.