When you record your menstrual cycle and find that it doesn't match that of your friends, the first reaction of many people is:
“Am I ill?”
“Is it because my ovary function is not good?”
“Will having a 3-day menstrual period make me age faster?”
However, for the majority of women, a menstrual period lasting from 2 to 8 days is within the normal range, with an average of approximately 4 to 6 days. According to the commonly used standards in gynecology, a normal menstrual cycle typically falls between 21 and 35 days, and there are significant variations among individuals.
That is to say, merely looking at “how many days it has lasted” is usually not sufficient to determine whether the menstruation is healthy.
What Should You Know About Your Menstrual Cycle?
The menstrual cycle is essentially a process of hormonal changes in the body that occurs once every month.
The cycle length is from the first day of one menstrual period to the first day of the next menstrual period.
In medicine, it is generally believed that:
l Normal cycle range: 21 to 35 days
l Average cycle length: Approximately 28 days
l Cycle fluctuation within 7 days: This is usually considered a normal phenomenon
Some people have shorter menstrual cycles by nature, while others have longer ones. As long as they remain stable over a long period of time, in most cases, this does not indicate any illness.
According to the classification of gynecological endocrinology, the menstrual cycle typically goes through four stages:
l Menstrual period (menstruation period)
l Follicular phase
l Ovulation period
l Luteal phase
Among them, the key factor that truly affects the regularity of menstruation is actually the changes in the levels of estrogen, progesterone in the body, as well as the ovulation function.
Is Your Menstruation Regular?
If any of the following situations occur, the cycle may be classified as “irregular”:
l Period shorter than 21 days
l Period longer than 35 days
l No menstruation for 3 consecutive months
l Bleeding lasts more than 7–8 days at once
l Menstrual flow suddenly increases or decreases significantly
l Two periods occurred within one month
l Abnormal bleeding during the intermenstrual period
l Severe abdominal pain, nausea, and vomiting
What many gynecologists actually care about is not “three days or seven days”, but:
Has there been any sudden significant change in the menstrual cycle?
Because sudden changes are often more worthy of attention than “being born this way”.
Why Is Your Menstrual Period Shorter?
Often, the length of the menstrual period is related to lifestyle and hormone levels.
Research has found that long-term stress can affect the “hypothalamic-pituitary-ovarian axis (HPO axis)”, thereby influencing ovulation and menstrual regularity. When under excessive stress, some women may experience:
l Menstrual cycle shortening
l Menstrual flow reduction
l Abnormal ovulation
l Cycle disorder
Rapid Weight Loss and Extreme Dieting
Many women will do the following during the process of losing weight:
l Long-term low-carbon diet
l Extremely low calorie intake
l Protein deficiency
But in fact, fats, cholesterol, and proteins are all important raw materials for the synthesis of estrogen and progesterone.
When intake is insufficient, the body will prioritize maintaining basic life functions, and the reproductive system's functions may be “downgraded in priority”.
Clinically, a very low body fat percentage may even lead to:
l Menstruation becomes shorter
l Menstrual flow decreases
l Ovulation stops
l Amenorrhea
Excessive Exercise
Intense training can also affect hormones.
Especially in:
l Marathon runners
l Bodybuilding athletes
l Gymnasts
l People engaged in long-term high-intensity fitness training
it is more common.
In medicine, there is even a concept called:
“Exercise-induced amenorrhea”
Long-term lack of energy and excessive consumption can inhibit the ovulation function.
Hormonal Contraceptive Pills
Contraceptive pills or hormonal intrauterine devices (IUDs) can also cause some women to experience:
l Menstrual cycle shortening
l Menstrual flow reduction
This is usually a common side effect and is not necessarily a disease.
Digestion and Nutrient Absorption Issues
In recent years, more and more studies have found that the relationship between intestinal health and hormone metabolism is very close.
Long-term existence of the following conditions may also have an indirect effect on the menstrual cycle:
l Gastrointestinal dysfunction
l Poor nutrient absorption
l Overeating and excessive drinking
l Extreme eating habits
When Will Those Three Days of Menstruation Become a Problem?
Usually, three days is not unusual.
However, the following situations deserve attention.
The Menstrual Period Suddenly Becomes Significantly Shorter
For example, previously it had always been 6 to 7 days. Recently, it has suddenly changed like this for several consecutive months 2 to 3 days.
In this case, it is more advisable to investigate hormone or endocrine-related issues.
Very Little Menstrual Flow
In medicine, it is generally believed that the normal menstrual flow is approximately 5 to 80 milliliters.
If it is reduced to the point where not even a single sanitary pad could be soaked, it may already indicate that the menstrual flow is abnormally low.
At the Same Time, Along With These Symptoms
If both of the following occur simultaneously, it is recommended to seek medical attention promptly:
l Dizziness
l Extreme fatigue
l Obvious hair loss
l Rapid weight loss
l Long-term gastrointestinal problems
l Increasingly irregular cycles
Why Does Your Menstrual Period Last Longer?
A prolonged menstrual period does not necessarily indicate a disease.
Many women have a naturally slower rate of endometrial shedding, which results in longer menstrual periods.
Hormonal Fluctuations
Changes in estrogen and progesterone can affect:
l The rate of endometrial thickening
l The speed of menstrual blood discharge
This results in prolonged menstruation.
Uterine Fibroids and Uterine Adenomyosis
The typical manifestations of these diseases include:
l Increased menstrual flow
l Extended menstrual period
l Increased blood clots
l Aggravated dysmenorrhea
According to gynecological epidemiological data, among women over the age of 30, the incidence of uterine fibroids is not low.
Long-Term Stress and Staying Up Late
Long-term lack of sleep can affect:
l Cortisol level
l Melatonin secretion
l Hormone stability
This further disrupts the menstrual cycle.
What Are the Signs Indicating That Menstruation Might Be “Excessive”?
If any of the following situations occur, it is recommended to seek medical attention as soon as possible:
l Every hour, a sanitary pad gets soaked through
l There are a lot of blood clots
l The bleeding lasts for more than 7–8 days
l Severe dizziness and fatigue occur
l Signs of anemia appear
Long-term excessive menstruation may increase the risk of:
l Iron deficiency anemia
l Chronic fatigue
l Palpitations
l Decreased concentration
What’s the Difference Between 3 Days and 7 Days?
In simple terms:
|
Comparison Item |
3-day Menstruation Cycle |
7-day Menstruation Cycle |
|
Menstrual Cycle Length |
Shorter |
Longer |
|
Menstrual Volume |
Usually less |
Usually more |
|
Total Blood Loss |
Lower |
Higher |
|
Pain Degree |
Usually mild |
Sometimes more obvious |
|
Common Causes |
Stress, weight loss, hormonal changes |
Hormonal fluctuations, fibroids |
|
Risk of Anemia |
Lower |
Higher |
However, at present, there is no clear medical evidence to prove:
l Short menstrual cycle = Poor ovarian function
l Long menstrual cycle = Younger age
l Short menstrual cycle = More difficult to get pregnant
l What is truly important, however, is:
l Is the cycle stable over a long period?
l Is the menstrual flow normal?
l Has there been any sudden change?
l Are there any abnormal symptoms accompanying it?
When Should One Go to See a Doctor?
If any of the following situations occur, it is recommended to check them as soon as possible:
l The menstrual cycle suddenly changes significantly
l The menstrual period lasts more than 7–8 days
l The menstrual period is shorter than 2 days
l The menstrual flow suddenly increases or decreases sharply
l Severe abdominal pain
l Frequent appearance of large blood clots
l Not having menstruation for several consecutive months
l Persistent dizziness and fatigue
How to Make Menstruation More Regular?
Don’t Go on an Extreme Diet
The recommended rate of healthy weight loss is 0.5 to 1 kilogram per week。
Long-term extreme low-carbon diets or extreme fasting can directly affect hormone synthesis.
Learn to Relieve Stress
Long-term stress can affect the neuroendocrine system.
You can try:
l Exercise
l Meditation
l Sunbathing
l Listening to music
l Taking a hot bath
l Exposing oneself to the natural environment more often
Avoid Staying Up Late
Long-term lack of sleep will increase:
l Hormonal imbalance
l Irregular cycle
l Inconsistent menstruation
l Adults generally suggest:
l Sleep for 7 to 8 hours every night
l Try to go to bed before 11 o’clock
Summary
Both a 3-day and a 7-day menstrual cycle can be normal.
Rather than merely focusing on “how many days have passed”, what is truly more important is:
l Is the cycle stable over a long period?
l Is the menstrual flow normal?
l Has there been any sudden significant change?
l Are there any abnormal symptoms accompanying it?
If your cycle remains the same and is stable over a long period of time, in most cases, there is no need to be overly anxious.
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