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Why is my period delayed if I am regular?

by Alivia Nyhan
Published: Last Updated on
My period delayed

Suppose you are one of those who can predict in three or four months when your period will drop because it always arrives precisely. Logically, you feel fear if your menstruation does not come on the scheduled day, but you should know that many causes can cause this to happen and are not necessarily related to pregnancy. However, you should know that it is one of the most frequent reasons. Other causes of delayed menstruation are certain hormonal disorders, stress, or excessive physical activity.

You will find in this FastlyHealarticle everything you need to know to answer the question: ” why is my period delayed if I am regular? “. Read on and find out for yourself.

Why does the rule go down every month?

The rule results from the female hormonal cycle working each month correctly. Variations in female hormone levels make all tissues respond to these changes.

The uterus, for its part, thickens, waiting for the arrival of a fertilized egg. When that does not happen, progesterone levels drop without any other remedy, leaving the most superficial layer of this organ to shed and present in the form of bleeding.

The usual thing is that this happens every 28 or 29 days and that during 4 or 5 days, bleeding takes place. It is more abundant the first two days to decrease its intensity. It should not be accompanied by other symptoms such as headaches, abdominal discomfort, or breast discomfort.

When this occurs every month, your body maintains a certain balance, but most women experience variations that respond more to imbalances than average differences. That is why paying attention to your menstruation is key to knowing your body.

Pregnancy is a frequent cause of delayed menstruation.

If a pregnancy is not yet in your plans, the doubt of pregnancy can have you quite worried.

If you had sex the month before your period did not arrive on time and you think there is a possibility of pregnancy, it might be.

To know if you are pregnant or not, it is best to take a pregnancy test. You will be calmer if you can remove that doubt from your mind. We recommend that you consult the article When to do the pregnancy test? and The first symptoms of pregnancy.

Pregnancy is a frequent cause

Hormonal disturbances

Female hormones can be altered by many factors and consequently cause changes in the rule, so hormonal changes can be another cause of delayed administration even if you are regular.

Hormonal medication

If you took a morning-after pill the previous month, started taking birth control pills, or swapped some birth control for another, your period is likely to be altered.

Synthetic hormones and those produced by your body are not the same. They can generate other responses in your tissues and even modify your menstruation.

Hormonal diseases

Polycystic ovary syndrome is one problem that most frequently affects female hormones. In that case, in addition to a delay, you may suffer from excess body hair being overweight, among other symptoms.


Around 50 years of age, women experience a decrease in hormonal production. This at first can be unstable and generate various symptoms like for instance:

  • Alterations in menstruation.
  • Hot flushes.
  • Warmth sensation.
  • Discomfort in the breasts.

The period in which this happens is very variable, and the habits and imbalances suffered by the woman influence this. That time is known as perimenopause, and it may be that in that case, the period does not arrive when or how it used to come.

This hormonal decline occurs prematurely in some cases, known as premature ovarian failure or early menopause.


Too much physical activity is just as detrimental to your health as the lack of it.

If you had incorporated much more exercise than you were used to doing, this may be the reason why your period did not drop when you expected it.

Try to practice physical activity according to your age and your physical condition without falling into exaggerations that will end up damaging not only your hormonal system but will also cause wear and tear on your body. This can have serious long-term consequences.

Thyroid problems

The thyroid is an organ that releases hormones. The function of thyroid hormones is very complex since they affect your body.

When there is a problem due to excess production or deficiency of the thyroid, changes in your menstruation may appear. As we have seen, it is not desirable for this to happen. Your entire body must work in harmony to stay healthy. You can consult the article Symptoms of thyroid problems that you should know for more information.

Excessive weight loss

If you have been on a diet and have lost a lot of kilos, your body has likely weakened. Rigorous and practiced diets are not suitable. All your tissues need adequate nutritional intake, and stopping that information suddenly is very harmful.

Yes, it is good that your diet is as natural as possible and that the changes you make are gradual. In this way, you can achieve results that last much longer without affecting your health.


If you are being treated with certain medications, your period may be delayed. Among the drugs that have been associated with delayed menstruation are:

  • Antiallergics.
  • Antihypertensive.
  • Antipsychotics
  • Antidepressants
  • Antieméticos.

Although, on the one hand, the drugs themselves are blamed, on the other, it is known that chronic diseases (such as diabetes or hypertension) are produced by an organic alteration that can generate changes in menstruation, among many other problems.

That is why in some cases, after stopping the medication, the rule returns to the way it was, but if habits are not changed, organic imbalances may be installed until you decide to change them.


The anxiety, depression, and stress themselves directly influence the body. The mind is potent and can work for us or against us. That is why learning to control it is so important when it is the cause of physical illness.

In some cases, menstruation can be affected when the mind is not at peace. When our mind makes problems more significant than they are, it directly affects something as important as a rule.

Is it worth putting your body aside? The delay of the rule is a notice that you are receiving. Only you can decide whether to pay attention to it or not.

Digestive problems

The direct relationship between digestion problems and menstrual disorders is rarely discussed.

Ancient medicines like Ayurveda consider that your whole organism will suffer if you do not have good digestion. Your tissues will not form properly, your defenses will be low, and problems will begin in those weakest areas of your body.

These problems can be related to alterations in menstruation, infertility, and some pathologies.

Understanding health as a whole is fundamental. Thinking that we are separate pieces of a puzzle doesn’t make much sense. On the other hand, if we aim for the whole body to balance and not dedicate ourselves to solving isolated problems, covering symptoms from here or there, it is possible to return to a proper state of health.

This article is merely informative. At FastlyHeal .com, we do not have the power to prescribe medical treatments or make any diagnosis. We invite you to see a doctor in the case of presenting any condition or discomfort.

If you want to read more articles similar to Why is my period delayed if I am regular, we recommend that you enter our category of Female reproductive system.

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