When a period is delayed, it is important to analyze why it is delayed because there may be some problems with delayed periods, one being pregnancy and the other being menstrual irregularities. If pregnancy can be excluded, a delay of seven days is usually a normal period. The menstrual cycle is usually 28 days plus or minus 7 days normal. If each month has its own pattern, i.e. 28 days or 35 days, that is its regularity. If one month is 28 days and the next month is 35 days, this kind of menstrual cycle cannot be called a regular menstrual cycle. If the HCG value is within the normal range, it usually means that the period is delayed and you can wait for the period to come or give progesterone treatment to allow the period to come.