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Reasons for Having a Period Every Two Weeks

By Joanna Karpasea-Jones
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Reasons for having a period every two weeks
Andres Rodriguez/PhotoSpin

The menstrual cycle occurs in all females from the onset to puberty (average age 11 or 12 years) to the menopause in middle age (average age between 45-55). The lining of the uterus is shed via vaginal bleeding when a girl or woman has not conceived a pregnancy.

The menstrual period lasts between two days and seven days, usually occurring once every 28 days, although anything from once every 24 days to once every 35 days is considered normal.

If you are having a period more than once every 24 days, it is considered an irregular cycle.

Having a period once every two weeks, or twice a month is abnormal and you should see your doctor because you may become anemic if you are having very frequent periods. They are sometimes a sign of infection or other medical problem that would need treatment.

Reasons for a period every two weeks could be:

• Dramatic weight loss or gain -- This changes the hormones in the body and these are responsible for directing when the period will start.

• Excessive exercise -- This too disrupts hormones.

• Stress -- Exams, family argument, financial worries, divorce, even a holiday can cause a temporary change in your menstrual cycle.

• Illness and/or medications -- Some medications can affect your cycle. Talk to your doctor about altering or stopping your medication if you think this is happening.

• Uterine problems such as polyps, cysts, fibroids or tumors (either benign or cancerous).

• Sexually transmitted infections -- These can cause bleeding in between periods which can be mistaken for a period.

• Thyroid problems -- Thyroid disease could cause a thickening of the uterine lining, resulting in more bleeding than normal.

• Reactions to contraceptive methods -- Sometimes the pill, depo provera injections or the copper-only IUD can result in a change in your cycle.

~ The pill and IUD can make you bleed in between periods, known as "breakthrough bleeding" and this may be mistaken for a period.

~ The IUD can also make your periods heavier.

~ The depo-provera injection can make your cycle irregular, however, it often stops your period altogether instead of making it more frequent.

Add a Comment43 Comments

EmpowHER Guest

This just ain't good. Im only 15 n I get periods twice a month. I don't know why but before it used to be normal n now it is not. Is it because I started martial classes since a year ago. Please any advice would help me. And I cant go to the doctor because my dad is against all this stuff. So any advice related to home remedies would help me a lot. I'm in need with some help. Please anybody . I'm just so scared of periods sometimes I get mad and wishes to get rid of periods forever.

March 22, 2015 - 10:23am
EmpowHER Guest

I was a virgin and I had Sex with my boyfriend after two days I had my periods and now every week experience the same thing

March 17, 2015 - 7:52pm
EmpowHER Guest

Before December my periods have been every 4 weeks for 6/7 days, I even knew the date I would come on. In January I had a very heavy 2 week period , strange but I just ignored it, was off for a week and then came back on again. This keeps happening I will be on for 1 week heavy and then off a week then back on. I am not on any contraception.
Any advice would be appreciated.

March 17, 2015 - 4:06pm
Maryann Gromisch RN Guide (reply to Anonymous)

Hello Anonymous,

My advice is to schedule an appointment with your gynecologist.

Uterine fibroids can cause heavy and irregular periods.

With this bleeding pattern, you are at risk for iron deficiency anemia.


March 18, 2015 - 9:09am
EmpowHER Guest

Hi, i gave birth last June. The month of December i had a very light but 4 day long period. I do have iron deficient anemia already. January, i had a 10 day long period. Last month at the end of the month, i had a normal but heavier period. Now I'm on another period two weeks later! I don't face a doctor, and i have been wacky on taking my pills at 6 pm to 11 pm by accident. I just need to know what could be wrong? I'm also under way too much stress with everything in life...

March 15, 2015 - 3:07pm
Maryann Gromisch RN Guide (reply to Anonymous)

Hello Anonymous,

Are you referring to birth control pills? If so, taking oral contraceptives irregularly will cause irregular vaginal bleeding. Stress usually delays the start of a period.

I appreciate you have your reasons for not wanting to consult a doctor, but Anonymous, we are talking about your health, and an answer cannot be given over the internet without knowing your medical history and physical exam, which only your doctor has access to.


March 16, 2015 - 9:16am
EmpowHER Guest

Ive been having my period every 2 weks for the last 6 months my periods has always been normal until now

March 14, 2015 - 11:24pm
Maryann Gromisch RN Guide (reply to Anonymous)

Hello Anonymous,

This change in your menstrual cycle must be mentioned to your gynecologist. It is abnormal, and persisting for six months, puts you at risk for iron deficiency anemia.


March 16, 2015 - 9:12am
EmpowHER Guest

I experienced a miscarriage about 6 mo ago. I realized this after I started spotting:( My last couple of periods have occurred every 2 weeks. It is not heavy and last about 2 and a half days. I'm wondering if I was pregnant again and just spotting again or if there is another reason for this. Any advice is appreciated:)

March 13, 2015 - 7:49am
Maryann Gromisch RN Guide (reply to Anonymous)

Hi Anonymous,

Considering your history of a miscarriage that presented with spotting, I think you need to consult your gynecologist, who knows you and your medical history.


March 13, 2015 - 9:19am
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