1. Hormonal Imbalances
This is the most common reason. That’s because your period is determined by the back-and-forth action of two major hormones in your body: estrogen and progesterone. It can cause problems when one is too high or too low.
High estrogen relative to progesterone, for example, can result in the uterine lining building up more than it breaks down each month, and produce heavier and longer bleeding. This is one of the answers to why my period is so long. If you get your period lasting more than 2 weeks and there’s no clear explanation, hormones are most likely the reason.
2. Uterine Fibroids or Polyps
(These are gentle, noncancerous growths in the uterus.)
Fibroids are noncancerous muscular tumors that develop in the wall of the uterus. Polyps are soft, small growths on the lining of the uterus (endometrium).
Both can interfere with the shedding and cause the muscles of the uterus to not contract properly, which leads to a much longer period. If your periods last for longer than 2 weeks and you’re also experiencing very heavy flow, fibroids or polyps could be to blame.
How We Can Help
At The Embryon Family, we support international couples facing fertility challenges by offering personalized surrogacy and egg donation programs in Ukraine.
Our services are designed for intended parents who:
- Experience irregular or prolonged cycles
- Have been diagnosed with hormonal or uterine conditions
- Have struggled with IVF or natural conception
Book a free consultation to explore your options and next steps.
3. Intrauterine Devices (IUDs)
A copper IUD is a highly effective non-hormonal method of birth control. But one of its side effects, particularly in the months following insertion, can be heavier and longer periods. It is a frequent question our female patients ask, Why won’t my period stop? If you’ve gotten a copper IUD recently and suddenly find yourself on a 2-week-long period, this could be the straightforward answer.
4. Pregnancy Complications
This may sound counterintuitive, but some pregnancy problems, such as an ectopic pregnancy (when a fertilized egg develops outside the main cavity of the uterus) or an early miscarriage, can actually appear to be a very long, heavy period. This is a significant point to ponder when speculating what causes long menstruation.
If you have a period that is longer than two weeks and there’s any possibility you could be pregnant, get to a doctor right away.
5. Roid Gland Issues
You have a small, butterfly-shaped thyroid gland in your neck that churns out hormones that regulate many body functions, including aspects of your menstrual cycle. An overactive thyroid (hyperthyroidism) as well as an underactive thyroid (hypothyroidism) can throw off your flow, resulting in anything up to a period lasting 2 weeks.
One of the reasons for a long-lasting period can be thyroid problems.
6. Bleeding Disorders
In some rare instances, persisting for a long time (particularly if it’s very heavy) might indicate an underlying blood-clotting or bleeding disorder like Von Willebrand Disease. These disorders interfere with normal blood clotting. If you’ve always had abnormally long or heavy periods, and also experience easy bruising or prolonged bleeding from minor cuts, this might be what causes long menstruation.
7. Perimenopause
The years around the time of menopause (perimenopause) involve hormonal changes in the body and are typically a time of higher anxiety and stress levels. By the time you reach your late 40s or early 50s, your ovaries begin winding down the production of estrogen, but not smoothly. These fluctuating hormone levels are likely the cause of the frustration that comes with a period lasting over 2 weeks, and wondering, Why is my period so long?
