If the pregnancy test is a bar for 8 days after the period is delayed, it is possible that the delay is due to the woman’s emotions, or the delay is caused by getting cold or eating cold food before or after the period, so it is not necessary to worry too much and wait for a few more days. If the period is delayed for a longer period of time, more than 10 days, it is recommended to perform a blood HCG test, because the blood HCG test is relatively accurate. If the blood HCG test excludes that the delayed period is not caused by pregnancy, a hormone level test or ultrasound test should be performed to understand the thickness of the endometrium. If the menstruation is occasionally delayed and the endometrium is thicker on ultrasound, progesterone can be given to promote the menstruation.