Period FAQs

why is my period shorter this month

by Nellie Russel Published 1 year ago Updated 1 year ago
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Most common causes

  • Certain nonhormonal medications Some over-the-counter medications can interfere with period length. Anticoagulants, such as aspirin, help prevent blood clots by prohibiting platelets from clumping together. ...
  • Hormonal birth control ...
  • Ovulation ...
  • Emergency contraception ...
  • Abortion (first period after) ...
  • Early pregnancy ...
  • Miscarriage ...
  • Uterine polyps or fibroids ...
More items

The length of your period can fluctuate depending on many different factors. If your period suddenly becomes much shorter, though, it's normal to be concerned. While it could be an early sign of pregnancy, there are many other possible causes, including lifestyle factors, birth control, or a medical condition.Jul 10, 2019

Full Answer

What causes your period to be shorter or lighter than normal?

Many factors can alter a person's menstrual flow and make their period unusually light. Body weight, exercise, and stress can all cause light periods and knowing why can be helpful. Lighter periods than normal do not usually cause concern.

What can cause a short period?

Many conditions and occurrences can cause a short period of bleeding. Pregnancy, pregnancy loss, endometriosis, anovulatory bleeding, and PCOS can all cause short spells of bleeding that people may mistake for a period.

What causes long periods and when to seek help?

If you are below 4o years, then you may have pain and prolonged periods. If your doctor finds uterine polyps as the cause of your prolonged periods, a D&C will be advised. 4. Cancer of the endometrium. Cancer that affects the endometrium of the uterus can cause bleeding in women especially after 40 years.

Why is my period lasting so long?

What causes long periods?

  • Hormone and ovulation changes. Changes to your hormones or ovulation may cause a long period. ...
  • Medications. You may experience long periods because of medications you take.
  • Pregnancy. ...
  • Uterine fibroids or polyps. ...
  • Adenomyosis. ...
  • Thyroid condition. ...
  • Bleeding condition. ...
  • Obesity. ...
  • Pelvic inflammatory disease. ...
  • Cancer. ...

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How long does a period last?

A person’s period may be shorter or longer than that of their friends or relatives. If a period lasts around 2 days , doctors consider it normal. However, if a person’s period stops suddenly, or they experience intense pain, they may need to see a doctor.

What does it mean when you have a delayed period?

It occurs around the time a person expects their period. This could be early pregnancy spotting or delayed implantation bleeding. It occurs after a delayed or missed period. This may be early pregnancy spotting or an early pregnancy loss.

What is anovulatory cycle?

An anovulatory cycle is when the ovaries do not release an egg. Anovulation typically occurs among those who are approaching menopause.

When does spotting occur?

Spotting can also occur 1–2 weeks after fertilization has occurred. Shorter bleeding may be a sign of pregnancy if: It occurs midway between ovulation and when a person expects their period. This may signal implantation bleeding. It occurs around the time a person expects their period.

Where does endometriosis occur?

Endometriosis occurs when tissue that is similar to the tissue that grows inside the uterus starts to grow outside the uterus. The tissue typically grows on the ovaries, the fallopian tubes, or the tissues that hold the uterus in place. It can also grow in the vagina, bowels, bladder, rectum, and cervix. Rarely. Trusted Source.

When do you start experiencing perimenopause?

When a person reaches the age of 30–50 years old, they may start to experience perimenopause.

When do women bleed during pregnancy?

Many women bleed during pregnancy, especially in the first trimester.

How long does it take for your period to go from 6 to 3?

Some of those causes are totally benign, but others are best ruled-out (or caught) early. Here, experts share the most common reasons that you period might go from six days to, suddenly, three. Rule them out the next time your period cuts out early.

What to do if your period is suddenly breaking?

If your period is suddenly breaking pattern, consider if you've started or changed birth control methods. “The pill might lessen the length of flow,” says Dr. Dweck. Mary Jane Minkin, MD, a clinical professor of obstetrics and gynecology and reproductive sciences at Yale Medical School, agrees. “Most birth control pills and rings, like the Annovera vaginal ring, lead to lighter flow,” she says. “The combined hormonal contraceptives contain a good amount of progestins—synthetic progesterone—which limit the build-up of a lot of tissue lining the uterus,” she explains. As a result, there’s less of a flow when it’s go time. Progestin-only IUDs “allow a very limited buildup,” Dr. Minkin says, and many women have a lighter flow or even no period when they have one of those implanted.

What happens if your ovaries aren't working properly?

If your ovaries aren’t working correctly, they won’t produce the right amounts of estrogen or release eggs when they’re supposed to, which could lead to shortened and irregular cycles, she says.

When does perimenopause start?

Perimenopause, the time before menopause, when your body starts transitioning hormonally, typically starts in women's forties, but can start as early as the thirties. And “it can last anywhere from four to six years,” says Richardson. “During that time, women may have shorter cycles or may not have a cycle at all.”.

Can you have a cycle while breastfeeding?

Most women who are breastfeeding exclusively will not have a cycle while they are breastfeeding,” says Richardson. “Breastfeeding could delay ovulation for as long as 18 months, because the body is suppressing ovulation hormones by producing prolactin, alpha-lactalbumin, and lactose synthesis.” A normal cycle will return only when you stop or decrease the amount of breastfeeding, but even then, it could be shorter than normal due to the fluctuating hormones.

Does birth control affect period?

Beyond the birth control pill, certain medicines could also affect your period, thanks to the chemicals in them. “ NSAIDs [like Advil, Naprosyn, ibuprofen, etc.], antidepressants, thyroid medications, and steroids might shorten flow,” Dweck says. “Ruling out other causes of change in flow and taking a good medical history might lead to diagnosing medication as the cause of menstrual change.”

Does an IUD affect your period?

Also, “the hormonal IUD will likely lighten your flow, and some women lose their period altogether,” she says.

How Long Should a Menstrual Cycle Be?

To start, let’s look at what a typical menstrual cycle looks like. Whenever I talk about a “normal” menstrual cycle, I always do so with the reminder that since we are all different, there is a range of what is considered normal. Cycle length can vary between women and even change monthly within your own cycle.

Menstrual Cycle Length and Age

If your menstrual cycle is getting shorter, one of the first things to consider is your age. From the early days after you first start your period to the years leading up to menopause, it’s normal to experience fluctuations in cycle length.

Reasons for a Short Menstrual Cycle

Aside from age, a short menstrual cycle can occur for several reasons. Cycle length may shorten because your period only lasts a few days. Or it can be due to your period actually coming earlier than usual.

Can a Short Cycle Affect Fertility?

Short cycles could affect your chances of getting pregnant, but not always. As a short cycle can indicate hormone imbalance or that you aren’t ovulating, it can impact your fertility. Without ovulation, you can’t get pregnant.

When to See a Doctor

There are many reasons for a shortening menstrual cycle, and some are entirely normal. But if you are concerned that there is something else going on, listen to your intuition. There are also reasons (as you just learned about above) that require a closer look, including PCOS or thyroid conditions.

Normal vs. Short Period Cycle

A woman’s menstrual cycle is the time between each period (vaginal or uterine bleeding). The days are counted from day one of bleeding from each period to the next. Depending on when a woman ovulates, most cycles last 21 to 35 days. Bleeding times average three to seven days and often shorten as you age. A short period cycle is less than 21 days. 1

Causes

There are multiple factors that can contribute to a shorter time between periods or shorter bleeding times, including birth control, pregnancy, medications, lifestyle factors, and more. While many reasons are not a cause for concern, there is a possibility of serious health conditions such as an ectopic pregnancy.

Medications

Medications such as non-steroidal anti-inflammatory medications ( NSAIDs ), antidepressants, thyroid hormones, and steroids can shorten period bleeding time. The same is true for women who’ve stopped taking some medications such as blood thinners.

Diagnosis

Your healthcare provider will begin by taking your medical history and asking about your cycle and any symptoms. If needed, they will perform a pelvic exam and a pregnancy test is typically ordered for women of childbearing age. They may also suggest blood levels to check your ovaries, endocrine system, or hormones.

Summary

Menstrual cycles or periods are a monthly experience that most women go through. Sometimes women notice that they are getting periods more often or their bleeding time is shorter. This can be due to a number of causes, including pregnancy, birth control, health conditions, medications, stress, and more.

A Word From Verywell

Occasional changes in your period are normal and can happen due to stress, an unhealthy diet, changing hormones, or too much exercise. However, your healthcare provider needs to know you are experiencing a shortened menstrual cycle so they review your medications and rule out any underlying conditions.

Reasons why your cycle overall may get shorter

Your menstrual cycle is actually made up of four phases.

Is there such a thing as a "normal" period?

For the record, no, there is no such thing as a normal period. "It's only what's normal for you," Greves says. "We are all different."

Bottom line

There are a slew of possible reasons why you might develop a shorter period or shorter menstrual cycle. If you notice that things have changed for you and they're consistent, it doesn't hurt to check in with your doctor to see what could be behind all of this.

Why is my period so short?

Reasons for a Short Menstrual Period. Estrogen is the all-important hormone required to create the endometrium each month. If you do not produce a certain amount of estrogen, that lining won't be very thick and, when it is shed, "bleeding tends to be scant and for fewer days,” Dr. Arias says.

What does it mean when you have a short period?

A short menstrual period might seem like a gift, but a light or irregular period could signal pregnancy, menopause, or even a serious medical problem .

What Is Polycystic Ovary Syndrome?

The excessive hormonal production associated with PCOS can interfere with a woman's ability to ovulate — and it may also lead to skin and weight...

How long does a woman's period last?

As long as a woman's short menstrual period is part of a steady pattern and fits within this range, this is normal menstruation for her body. "If your period lasts for three days, month in and month out, that's your pattern," says Maria Arias, MD, a gynecologist at Atlanta Women's Specialists in Georgia.

What are the conditions that affect the menstrual cycle?

Hormonal problems stemming from the pituitary gland and hypothalamus (which can affect ovarian functioning), thyroid dysfunction, and polycystic ovary syndrome ( PCOS) are just some of the conditions that can alter your menstrual cycle.

How to keep track of your period?

Keep track of your period in a journal or calendar if you're concerned about a menstrual cycle that's too short. This way you'll have the most accurate information to share with your doctor and will be able to easily detect a menstruation pattern that’s not normal for you.

Why is my period not coming on time?

Doctors treating women of childbearing age who are experiencing irregular periods will check for abnormal causes like an ectopic pregnancy, which is when a fertilized egg sits in a fallopian tube instead of the uterus. "If your period isn't coming on time, the first thing doctors rule out is pregnancy," says Arias.

What is the average menstrual cycle length?

As mentioned above, it’s widely accepted that a 28-day menstrual cycle is the average. But there’s a difference between average and most common.

Does your age affect your menstrual cycle length?

The first factor that Grieger and Norman wanted to explore was how age might impact the length of your menstrual cycle. So, they compared all age groups of Flo users.

Can weight affect menstrual cycle length?

While aging is an inevitable thing that we all experience, other lifestyle factors may also impact the length of your menstrual cycle.

Can stress levels impact your menstrual cycle length?

Because stress levels and mental health play such a key role in how you feel, Grieger and Norman wanted to establish if stress levels can impact the menstrual cycle. And in short, they absolutely can.

Can smoking and alcohol affect menstrual cycle length?

While you might not link letting loose on the weekend with your period, past research published in the Fertility Research and Practice Journal has noted that heavy alcohol consumption can make it more difficult to get pregnant.

What causes your menstrual cycle length to change: The takeaway

Grieger and Norman set out to establish how lifestyle factors like stress levels, BMI, and smoking and alcohol habits could impact menstrual cycle length.

Why do women have periods?

As a result, a woman may have a light period because there is minimal uterine lining to shed. This may also occur in people using the hormonal IUD, contraceptive implant, or injection, as these cause thinning of the uterine lining.

Why is my period light?

Many factors can alter a person’s menstrual flow and make their period unusually light. Body weight, exercise, and stress can all cause light periods and knowing why can be helpful. Lighter periods than normal do not usually cause concern. People often find their menstrual flow varies from month-to-month, and some months are naturally lighter ...

How to know if your period is lighter?

People should make a note if their periods are lighter than they usually are. A person can measure the amount of menstrual blood they produce each month by using a menstrual cup. A light period can have some of the following symptoms: shorter in duration than is usual for the individual.

How much blood does a woman have during her period?

Most menstrual periods consist of about 2–3 tablespoons of blood.

How does stress affect your period?

Extended periods of stress can affect the body’s hormones, which can interrupt the regular menstrual cycle. Taking steps to manage stress can help a person’s periods return to normal.

What is PCOS in menstruation?

Polycystic ovary syndrome (PCOS): Certain reproductive conditions, such as polycystic ovary syndrome, can affect hormone levels and menstrual flow. People may want to talk to their doctor about individual risk factors that may affect the severity of their periods.

How much blood does a light period lose?

A person may not need to change their pad or tampon frequently during a light period. During a usual menstrual period, people lose around 2–3 tablespoons of blood on average. However, there is wide variation between individuals.

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Normal vs. Short Period Cycle

Causes

Medications

Diagnosis

  • Your healthcare provider will begin by taking your medical history and asking about your cycle and any symptoms. If needed, they will perform a pelvic exam and a pregnancy testis typically ordered for women of childbearing age. They may also suggest blood levels to check your ovaries, endocrine system, or hormones. When necessary, the healthcare team may also suggest imagin…
See more on verywellhealth.com

When to Seek Medical Attention

  • Contact your healthcare provider if you experience the following:2 1. Irregular periodsafter established cycles 2. Periods that occur every 21-24 days or less 3. A cycle longer than 35-38 days 4. Spotting or bleeding when it’s not your period 5. A skipped period for three months in a row and are not pregnant or breastfeeding 6. You’ve not started your period by age 15 or within t…
See more on verywellhealth.com

Summary

  • Menstrual cycles or periods are a monthly experience that most women go through. Sometimes women notice that they are getting periods more often or their bleeding time is shorter. This can be due to a number of causes, including pregnancy, birth control, health conditions, medications, stress, and more.
See more on verywellhealth.com

A Word from Verywell

  • Occasional changes in your period are normal and can happen due to stress, an unhealthy diet, changing hormones, or too much exercise. However, your healthcare provider needs to know you are experiencing a shortened menstrual cycle so they review your medications and rule out any underlying conditions.
See more on verywellhealth.com

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