The term “vacation” refers to menstruation, and the HCG test 5 days before menstruation is generally more accurate. Ovulation is usually about 14 days before the next menstrual period, 5 days before menstruation to check HCG, at this time the fertilized egg has basically entered the uterine cavity, began to bed, so through the HCG test can determine whether there is a pregnancy, but everyone’s physical condition is different, the length of time for the fertilized egg to bed is different, so when to carry out HCG testing can not be accurately judged. If you want to determine whether you are pregnant or not, you can wait for 10 days after intercourse to see your doctor for a checkup, which is relatively accurate, or you can wait for the next period to be delayed for 3~7 days before coming back for a checkup. If you are pregnant, you must pay attention to good physical conditioning and get plenty of rest.