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Causes of Delayed Periods and Birth Control Pills, Plus Treatment and Prevention

Sinchon Dain Dental Hospital · 신촌다인치과병원 · May 21, 2025

Delayed Periods and Birth Control Pills Causes, Treatment, and Prevention ​ ​ If you are a woman, you experience your period once a month, but when it is delayed compared to the ex...

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This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Sinchon Dain Dental Hospital

Original post date: May 21, 2025

Translated at: April 24, 2026 at 1:51 AM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

Delayed Periods and Birth Control Pills

Causes, Treatment, and Prevention

Causes of Delayed Periods and Birth Control Pills, Plus Treatment and Prevention image 1

If you are a woman, you experience your period once a month,

but when it is delayed compared to the expected date,

it can cause a lot of concern and anxiety.

Menstruation usually occurs on a 28-day cycle for 2 to 7 days,

and during this period, symptoms vary from person to person,

and in severe cases, hormonal imbalance may be suspected.

Today, we will take a detailed look at whether it is okay to take birth control pills when your period is delayed,

as well as the causes, symptoms, diagnosis methods, treatment methods, and more.

Causes of Delayed Periods and Birth Control Pills, Plus Treatment and Prevention image 2

Factors that can trigger delayed periods include hormonal

abnormalities, stress, and various illnesses, so it is important

to clearly identify the cause.

In general, a cycle of 21 to 35 days is considered normal, and if

it falls outside this range, it is judged as a delayed period; if there

is a possibility of pregnancy, you should first check whether you are pregnant.

If you have been experiencing prolonged period delays, amenorrhea,

or severe menstrual pain, polycystic ovary syndrome may be suspected.

Causes of Delayed Periods and Birth Control Pills, Plus Treatment and Prevention image 3

In the case of polycystic ovary syndrome, a representative condition associated with delayed periods,

overulation becomes irregular, and periods may be delayed for several months.

Due to hormonal abnormalities, androgen secretion in the ovaries increases, ovulation does not proceed smoothly,

and this condition is also linked to metabolic syndrome in the long term.

In addition, thyroid dysfunction, hyperprolactinemia,

premature menopause, and reproductive organ-related conditions can also adversely affect ovulation and the uterine environment,

changing the menstrual cycle.

Causes of Delayed Periods and Birth Control Pills, Plus Treatment and Prevention image 4

Taking certain medications can also affect the menstrual cycle,

and birth control pills, psychiatric medications, and steroids are among the representative examples.

In particular, if you have been taking birth control pills for a long time and suddenly stop,

your menstrual cycle may temporarily become irregular,

and it may take some time to recover.

Also, for women in their 40s and older approaching menopause,

ovulation gradually decreases, and the cycle interval often naturally becomes longer.

Causes of Delayed Periods and Birth Control Pills, Plus Treatment and Prevention image 5

In the case of stress, it is a factor that has a major effect on women's hormone secretion,

and if you have recently experienced severe fatigue or mental tension, it can lead to delayed periods.

When you are under stress, the hormone cortisol is secreted,

and this hormone interferes with the balance of estrogen and progesterone hormones,

which affect the menstrual cycle.

Therefore, if a woman has repeated period delays along with symptoms such as bleeding, pain,

or changes in discharge, it is helpful to receive care at a related medical clinic.

Causes of Delayed Periods and Birth Control Pills, Plus Treatment and Prevention image 6

The first thing to check when your period is late is whether there is a possibility of pregnancy,

and if it has been a week since the expected date, it is a good idea to use a pregnancy test.

A clear result can be obtained through a blood test,

and if you are not pregnant, you should check whether you have recently been under vague stress and what your current sleep condition is like.

Missing one or two periods may not be a major problem,

but if it happens repeatedly or amenorrhea continues for more than 3 months, be sure to seek medical care.

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