Why do scanty periods appear when taking birth control pills?


Monthly while taking birth control pills often change their character. The reason - in the hormones entering the body from the outside. Under their influence, there are changes that shift the cycle.

Scanty discharge, lack of menstruation or breakthrough bleeding is not always the result of pathology. If there are uncharacteristic symptoms, it is necessary to be examined by a gynecologist.

How do contraceptives work?

Monthly while taking birth control pills change. The drugs contain the hormone estrogen. He is responsible for the first phase of the cycle, vigorous activity of the ovaries, maturation and release of the egg.

Taking contraceptives provides increased estrogen levels and reduces fertility. Synthesis of follicle-stimulating substance is stopped, and ovulation does not occur. A woman is temporarily unable to become pregnant.

Another effect of hormonal birth control pills is to alter the nature of the cervical mucus. Normally, when ovulation it becomes transparent, viscous, egg-like. It is necessary to facilitate the entry of sperm into the uterus.

When taking contraceptives, the amount of cervical mucus decreases, its viscosity increases. Spermatozoa linger and not being able to move into the uterine cavity, die.

Monthly while taking contraceptives

The duration of menstruation is an individual factor. Monthly normal lasts from 3 to 7 days. Acceptance of oral contraceptives shortens their duration, reduces volume.

At the beginning of protection in the first cycles of the month go 2–3 days. After the organism adapts, the duration is up to 5 days.

Sometimes the monthly disappear completely. The reason is that the body takes time getting used to. As soon as the right amount of estrogen accumulates in the blood, your period will recover.

When using oral contraception to prevent unwanted pregnancy is not a true menstruation, but only menstrual discharge. Packaging contains 21 tablets. A woman takes a break of 7 days, during which rejection of the endometrium and menstruation begins.

OK or oral contraceptives doctors prescribe not only for the purpose of protection, but also to normalize the cycle. They are also suitable for the treatment of certain diseases, for example, endometriosis.


The advantage of contraceptives is that they normalize the menstrual cycle. Allocations become regular if previously there were problems with it.

If you need to make sure that there are no menstruations, do not take a 7-day break, and immediately begin to drink tablets from the next package. This can be done only in emergency situations.

If you practice the menstrual shift frequently, there is a risk of breakthrough bleeding.


Scanty menstrual flow when using OK - this is normal. Often in women there is not only a decrease in the duration of critical days, but also their profusion decreases, and the soreness disappears.

Reducing the amount of secretions has a positive effect on the amount of iron in the blood, the level of hemoglobin increases.

Mid cycle

When you start taking contraceptives, the body gets used to the intake of hormones from the outside. A side effect of pills is that the discharge does not end. Most often occurs when using low-dose hormonal agents, the amount of artificial estrogen in which - up to 20 micrograms.

If the dark monthly smear up to 3 months, measures should be taken. When bleeding in the first half of the menstrual cycle, the drug must be replaced by another with a dosage of the hormone - 30 mg. If blood in the second half of the cycle, you need to choose a product with other active substances.

If the intermenstrual discharge goes when using different OCs, you should choose another method of protection.

Monthly while taking contraceptives

If menstruation in the middle of the cycle began unexpectedly and there was no such thing before, you should remember whether the woman missed the pill, took any medication, such as antibacterial agents, or St. John's wort. They reduce the effect of hormonal contraception, as a result there are spotting secretions.

When bleeding in the middle of the cycle sex is not prohibited. This is not a pathology, but a side effect of taking OK. Recommended careful hygiene, it is better to use condoms in order to avoid infection.

Do not start

If there are no menstrual periods when using hormonal contraceptive pills, pregnancy should be excluded.

With a delay of 6 days after taking the last pill, you need to do a test.

When a negative result, begin taking pills from the new package. If positive, if it is decided to continue the pregnancy, the drug can no longer be taken. If necessary, interrupt her and available medical and vacuum abortion due to the early terms of gestation.

On the contraceptive action video

After cancellation

When you stop applying OK, the risk of conception dramatically increases. This phenomenon is called the rebound effect. Its duration is about 3 menstrual cycles.

The opposite situation is also possible - ovarian hyper-inhibition syndrome. Ovulation does not begin and no monthly.

This phenomenon is temporary, its termination occurs in the first three months after the abolition of contraceptives.

In the absence of ovulation and planning conception, a woman is prescribed a stimulant, for example, Klostilbegit.

If there are no periods after the abolition of contraceptives, an ultrasound of the pelvic organs is performed, a blood test for hormone levels is prescribed to determine the cause.

We recommend reading the article about why there are no periods, the backache hurts, and the test is negative. You will learn about the causes of lack of menstruation and back pain, possible diseases, the likelihood of pregnancy.

Why do menstruation go 2 days? Read here.

Recommendations gynecologist

When using hormonal contraception, you should regularly, up to 2 times a year, visit a doctor. During the examination, the doctor checks the cervix, ovaries, takes a smear.

It is impossible to choose OK independently, their selection is carried out by the gynecologist on the basis of the characteristics of the organism and the level of hormones.

If the monthly changes at the beginning of the reception of contraceptives and within 3 months have not returned to normal, you should also visit the doctor.

Article author: Sviridov Anna, gynecologist-endocrinologist

Why menstruation is disturbed

Oral contraceptives (OC) have the ability to eliminate violations of the menstruation cycle of a woman. For this reason, gynecologists are prescribed to take them to normalize the work of the ovaries. Such an effect on the body due to the presence in the composition of the OK hormonal substances such as estrogen and progesterone. There are many variations and ratios of these active ingredients in the preparations. However, all of them, without exception, even in minimal doses have a significant impact on the course of the cycle.

  • Wrong selection of birth control pills

The availability of all kinds of drugs on pharmacy shelves does not always play a positive role. Women's forums are full of topics about the ineffectiveness and sometimes harmful effects of contraceptives. Among the side effects of their use are the following:

  • weight gain
  • the appearance of acne and rashes uncharacteristic for women
  • no menstruation or scanty discharge.

By the use of any drug should be approached responsibly, after consulting with a doctor. Typically, the angry reviews about any contraceptives are written by those women who bought the pills, based on the feedback from their acquaintances to whom they approached. Without proper blood tests for hormones and consultations with a gynecologist, the risk of choosing the wrong contraceptive is greatly increased. Only a doctor based on the results of laboratory studies can correctly choose a contraceptive that would balance female hormones, protect against unwanted pregnancy and not trigger the development of health problems.

  • Hormonal changes not related to contraceptive use

Violation of the hormonal background in women can occur for reasons not related to taking birth control pills. The main causes of failures are called:

  • rapid gain or weight loss. Often the absence of menstruation is observed in anorexia,
  • experiencing severe stress or depression
  • excessive exercise
  • severe food poisoning
  • infectious diseases,
  • change of climate zone,
  • effects on the body of x-rays,
  • taking steroid drugs.

Due to the listed circumstances in a woman's body, the balance of active substances in the blood can change. Therefore, the old contraceptives, which she took, no longer fit and begin to cause unwanted side effects. What, then, is to be done? The selection of a new tool is carried out according to a similar scheme: blood tests for hormones are done and the gynecologist selects a new contraceptive.

Should there be a decrease in discharge when taking contraceptives?

Reducing the amount of menstruation is considered the norm, if the time of monthly go about 5 days, and the amount of discharge is reduced only on the second or third day of the beginning of menstruation. At the same time, the painful sensations are either absent or they are almost not felt, and the woman absolutely calmly transfers them.

Such changes are due to the fact that OK contribute to the reduction of the formation of the endometrium. Because of this, there is not enough favorable conditions for the egg to attach to the walls of the uterus. However, if scanty discharge appeared on the first day of menstruation, then this is a serious reason to sign up for a consultation with a gynecologist. The absence or delay of menstruation while taking birth control pills should also not be ignored by a woman. If the monthly periods were irregular before taking the pills, then in the first months the failures may continue and the monthly periods may not even occur. In this case, you should immediately come for a visit to a gynecologist.

What to do with bleeding between periods

One of the side effects of contraceptives is a slight discharge of blood that occurs in the middle of the cycle. This phenomenon is quite common in women in the first months of the adaptation of the body to the drug.

Laboratory studies show that after taking pills in 1/3 of women, mid-cycle bleeding stops approximately three months after taking contraceptives. There are cases when the adaptation period lasted about 6 months, or blood excretions were present during the entire period of taking the drug.

The composition of modern contraception includes moderate doses of hormones, so after 1-2 months of administration, their number may not be enough to maintain a natural level. After some time, the body gets used to new conditions and a reduced concentration of active substances, the endometrium, in turn, is no longer rejected prematurely. If in the middle of the cycle there are minor spotting, then you should not take any action. It is necessary to give your body enough time to adapt and hormones will soon return to normal.

The presence of spotting for too long (more than 6 months) sometimes becomes a cause for concern. It is recommended to visit the consultation of a specialist for the selection of another drug. Often the replacement of the remedy has a beneficial effect on the body and the bleeding no longer bother the woman.

If while taking birth control pills did not start or began monthly, but the allocation of scarce from the first day, you should contact your gynecologist. It is possible that the chosen remedy no longer corresponds to the needs of the woman’s body and its further reception will have a negative effect on health.