Although the delay menstrual period usually associated with a possible pregnancy, there are a number of other reasons that we can bring discomfort in the cycle. However, we should not panic because it is often a small hormonal imbalance that resolve spontaneously after which our cycle gets back to its natural rhythm.



However, it is important to monitor your body, keep a menstrual calendar and try to identify possible causes of change in the cycle to be able to react in time if you estimate that this is a serious issue. Therefore, we bring the most common reasons for the delay menstrual period:


Late menstruation is one of the earliest signs of pregnancy. Since the other early pregnancy symptoms, such as cramps, bloating and tenderness in the breasts, are similar to those that occur just before menstrual period, it is difficult to identify with certainty whether you are pregnant.

If your period is late, and you’ve had unprotected sex, it is best to do a pregnancy test. Although he is the most reliable one week after the expected menstrual period, today’s home tests are sensitive enough to register and to very small levels of the pregnancy hormone known as hCG, even on the first day of the missed period.


For a long time, we know that stress can have numerous adverse effects on the body, so in addition to In moments of great physical and psychological stress, the body produces high levels of adrenaline and cortisol. Due to the rapid growth of these hormones, the brain has to decide which are the most important bodily functions in a given time, which can wait until the stressful event passes.

Therefore, in stressful situations, the body decides to increase blood flow to the muscles and bring more oxygen to the lungs, and less important systems are in fact slowing down. So in stressful situations our digestive system is slowing down and can cause nausea or constipation, and stop the reproductive system can delay the onset of the menstrual cycle. Headaches, weight gain, acne and other problems, stress can also lead to delay menstrual period.


Even the smallest colds at the time of ovulation can lead to delay or even skip menstrual period. As in the case of stress, the body that fights disease will decide which physical tasks will give priority, so that ovulation can be delayed or until it does not even come.

In such cases, it is not unusual that period is late, and when it appears, may be unusually low. This should not be cause for concern because when our organism is healed and reproductive cycle will return to normal.

Change in weight

Sudden weight loss, low daily calorie intake and malnutrition affect the operation of the hypothalamus, the gland that is responsible for many processes in the body, including regulation of the menstrual cycle.

At the time of preparing the uterus for pregnancy, the hypothalamus secretes estrogen, which acts on the inner wall of the uterus is thickened and prepare to receive an embryo. If conception does not occur, the uterus is shed and menstruation ejects the excess material.

If the body is undernourished and lacks nutrients for normal functioning of the body, the hypothalamus will not secrete enough estrogen to the thickening of the uterus will not come on time, and in this case menstruation may be delayed or completely absent.

On the other hand, obesity or sudden weight gain will lead to increased secretion of estrogen. Then may be a delay of ovulation and in a few months or inner wall of the uterus may be too much to strengthen, resulting in abundant and delayed menstruation.

Intense exercising

Although physical activity is key to overall health, including reproductive, exaggeration in the exercise can also lead to reduced secretion of estrogen. As in the case of weight loss, due to the lack of estrogen the body will not be able to complete menstrual cycle causing menstruation may fail or come late in a weaker form.

Amenorrhea, or absence of menstruation for three months or more, common in the professional athlete, dancer and gymnast. However, the delay or absence of menstruation can also occur during recreational sports, especially if you are training intensive and diet plan are not followed consistently.

Fortunately, it is sufficient to take it easy and slow down the training to the menstrual cycle returned to its normal pace.

Changing biorhythm

The human body likes routine; regular meals, tidy rhythm of sleep, reasonably allocated time work and rest. Even small shifts within our daily schedule can lead to hormonal imbalance and thus to changes in the reproductive system and the delay period.

Change in work from day to night shift, far away and long journeys, not enough sleep, getting used to a different climate or diet – can all be causes of delay or even absence period.


Many women have no periods until they stop breastfeeding. The hormone responsible for milk production, prolactin, prevents ovulation and therefore does not come to menstrual period.

Menstruation usually returns six to eight weeks after weaning, and if there is no menstrual period for three months after, it is necessary to see a doctor.


Birth control pills or patches are the most common cause of sudden changes in the menstrual cycle. They prevent ovulation, without which there can be no menstrual period. The monthly bleeding while taking the pill or the patch actually are false menstrual period caused by falling hormone while taking placebo pills or during weekly breaks.

Sometimes birth control pills can suppress the hormones so that does not occur bleeding or that they will be extremely bad. Late periods, especially in the first months of taking oral contraceptives or patch application, it is not uncommon and you should not be concerned.

Also, a change in the cycle can come and when you stop using this type of contraception, and the body needs a few months to re-establish your natural rhythm of the reproductive cycle.

Menstruation can be delayed or absent and due to the use of some antipsychotics, antidepressants, corticosteroids and during chemotherapy.

Thyroid disease

Malfunction of the thyroid can affect the entire body, including the reproductive system and cause changes in the menstrual cycle.

Due to the increased work of the thyroid gland (hyperthyroidism) may cause failure or delay menstruation, and when it occurs, may be weaker and last shorter than usual. Other symptoms of hyperthyroidism include sudden weight loss, rapid heartbeat, sweating and insomnia.

Reduced thyroid (hypothyroidism) can also cause delayed menstrual period, but when it occurs can be more abundant and last longer. Hypothyroidism causes and sudden weight gain, constant fatigue, dry skin and hair loss.

Polycystic ovary

In addition to hormonal imbalances, ovarian cysts can prevent or delay ovulation therefore may lack or delay menstrual period.

If with irregular menstrual cycle and you notice excessive growth of body hair, acne and sudden increase in weight, the cause may lie in Polycystic Ovary Syndrome. Hormone levels can be determined by laboratory analysis of blood, a gynecological examination to confirm the diagnosis. The symptoms of polycystic ovary are usually mitigating with a contraceptive pill.


The average woman enters the menopause at 51 years old, but the body starts to prepare a lot before. Perimenopause is the period of adjustment during which the body begins to decrease estrogen production. Perimenopause can begin two to eight years before the menopause.

During this time, changes in the menstrual cycle are normal, so menstruation may be skipped, take shorter or longer than usual, be weaker or more abundant, and of course, may be delayed.

During this period, it is possible to experience the hot flashes, night sweats and difficulty sleeping, and frequent mood swings – these are all symptoms of perimenopause.