Hello Good Evening, As you have issue of missed period frequently, which is due to some common reason like: -Pregnancy -Menopause -Stress and anxiety -Excessive weight loss, or weight gain -Hormonal imbalance -Hypothyroidism -PCOS Menopause is not applicable in this case and pregnancy should be rule out but any of rest of the others can be a cause for her missing period, so please go through proper evaluation to get other causes like hypothyroidism or PCOS. PCOS (Polycystic ovary syndrome) produces symptoms in approximately 5% to 10% of women of reproductive age (12–45 years old). It is thought to be one of the leading causes of female sub-fertility and the most frequent endocrine problem in women of reproductive age. The principal features are anovulation, resulting in irregular menstruation, amenorrhoea, ovulation-related infertility, and polycystic ovaries; excessive amounts or effects of androgenic (masculinizing) hormones, resulting in acne and hirsutism; and insulin resistance, often associated with obesity, Type 2 diabetes, and high cholesterol levels. The symptoms and severity of the syndrome vary greatly among affected women. So go for a USG, TSH and other investigation to find out the cause of frequent amenorrhoea. Regards, Dr. Naresh Jain.