Reasons for Having a Period Every Two Weeks

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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 Comment73 Comments

EmpowHER Guest

I have gotten my period twice in one month and have had pregnancy syptoms My nipples hurt and I've feEl tired all the time and occasionally get sick in the morning I have multiple tests and all negative it's starting to concern me can anyone answer me to this?

May 4, 2015 - 2:57pm
EmpowHER Guest

hello.. I want to ask about my mentruation im irregular and its comes every 2month or 3 month... im 26 y/o my period started this year is february then april... but ask this month is twice a month, april 4 and april 25...but every periods are 2 or 3 days only... i ask about this month this is my first time that twice a month came.

April 29, 2015 - 8:28am
EmpowHER Guest

ok im used to having a cycle like clock work every month fer the last couple month i like clock work am having my cycle every 2 weeks and have fer the last 3 months i feel drained all the time very tired achy and very emotional

April 24, 2015 - 5:46pm
EmpowHER Guest

i was taking sulfamethox for three days and metrondizale for seven days so it was the whole five days when i was on my period but i also took azithromycin on my last day of my period and after i stoped my period i started taking nitrofurantoin mcr for five days

April 24, 2015 - 12:36am
EmpowHER Guest

hi, i got my period on april 3 and lasted five days but the fifth day i didnt bleed all day til late at i started bleeding but only a little and today april 22 when i woke i started feeling light cramps and when i went to pee i saw i was bleeding so i guess i started my period again this the first time it happens . but about two weeks ago after i started my period i was also taking medication could this have caused it for me to tet my period again

April 22, 2015 - 4:12pm
Maryann Gromisch RN Guide (reply to Anonymous)

Hello Anonymous,

What medication are you taking?


April 23, 2015 - 9:38am
EmpowHER Guest

Im 16 and 2 weeks after my cycle it started again i dont know why im worried but i think its weight lost because i am 43 kg before and suddenly now im 39 kg.. So do you think thats the reason??

April 22, 2015 - 6:56am
Maryann Gromisch RN Guide (reply to Anonymous)

Hello Anonymous,

Generally, extreme weight loss, and 4 kg is not extreme, causes a late or missed period.

How long have you been menstruating? Have your cycles been regular up until now?

If this pattern continues, speak with a parent. You may need to be evaluated by a physician for a possible hormonal imbalance.


April 23, 2015 - 9:36am
EmpowHER Guest
Anonymous (reply to Maryann Gromisch RN)

6 years and up until now im iregular.. I am alway late or sometimes early but its my first time to have it again 2 weeks after my cycle..

April 27, 2015 - 5:28am
EmpowHER Guest
Anonymous (reply to Anonymous)

5 years... Im sorryyy

April 27, 2015 - 5:32am
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We value and respect our HERWriters' experiences, but everyone is different. Many of our writers are speaking from personal experience, and what's worked for them may not work for you. Their articles are not a substitute for medical advice, although we hope you can gain knowledge from their insight.

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