Is it normal to not have a period last month but get it this month?

Generally, if a woman usually has regular menstrual cycles and only occasionally experiences a missed period last month followed by menstruation this month without other abnormalities, it is usually considered normal. However, if menstrual cycles have long been irregular, or if this occurrence is accompanied by discomfort, it may indicate an underlying issue. If concerned, it is recommended to seek medical advice promptly. Detailed analysis is as follows:

If the menstrual cycle is normally stable (21–35 days), and the previous month's period was delayed due to temporary factors such as emotional stress, irregular sleep patterns, excessive fatigue, or environmental changes, but this month's period arrives on time with a flow similar to usual, lasting 3–7 days, and without significant abnormalities such as severe abdominal pain or excessive blood clots, this situation is typically a transient menstrual disorder and generally normal. The body can gradually restore its regular rhythm.

If the menstrual cycle has historically been irregular, with frequent delays or early periods, or if this period—although present—shows a significantly reduced volume (less than 5 mL) or increased volume (more than 80 mL), or is accompanied by severe abdominal pain, prolonged duration (over 7 days), or abnormal blood color (e.g., dark black, large amounts of clots), it may be related to hormonal imbalances, polycystic ovary syndrome (PCOS), endometrial problems, or other conditions. These situations may be abnormal and require further evaluation.

If menstrual irregularities persist for 2–3 consecutive cycles, or are accompanied by other symptoms, timely medical consultation is necessary to check hormone levels and the condition of the uterus and adnexa, identify the underlying cause, and receive appropriate treatment.