When is menstruation normal?
Menstruation is one of the important signs of female reproductive health, and understanding the normal cycles and abnormalities of menstruation is crucial to women's health. This article will combine the hot topics and hot content on the Internet in the past 10 days to introduce in detail the normal range, influencing factors and common problems of the menstrual cycle.
1. Normal range of menstrual cycle

The menstrual cycle is the time between the first day of menstruation and the first day of the next menstrual period. Here are the normal ranges and related data for the menstrual cycle:
| age stage | normal cycle range | Average cycle days |
|---|---|---|
| Puberty (1-2 years after menarche) | 21-45 days | 28-35 days |
| Adult women (18-40 years old) | 21-35 days | 28 days |
| Perimenopause (over 40 years old) | 24-38 days | 30-35 days |
2. Factors affecting the menstrual cycle
The menstrual cycle is affected by many factors. The following are common factors and their effects:
| Influencing factors | possible impact |
|---|---|
| pressure | Prolonged or shortened cycles, or even amenorrhea |
| weight changes | Being underweight or overweight may cause irregular menstruation |
| amount of exercise | Excessive exercise may lead to oligomenorrhea or amenorrhea |
| diet | Malnutrition may affect hormone balance |
| disease | Polycystic ovary syndrome, thyroid disease, etc. can cause menstrual abnormalities |
3. Common symptoms of irregular menstruation
Here are some common symptoms of irregular menstruation and their possible causes:
| performance | Possible reasons |
|---|---|
| Period shorter than 21 days | Insufficient corpus luteum and abnormal ovulation |
| Period longer than 35 days | polycystic ovary syndrome, hypothyroidism |
| Heavy menstrual bleeding | Uterine fibroids, endometrial polyps |
| Low menstrual flow | Endometrial damage, abnormal hormone levels |
| Amenorrhea (more than 3 months) | Pregnancy, menopause, premature ovarian failure |
4. How to maintain a normal menstrual cycle
To maintain a normal menstrual cycle, you need to pay attention to the following aspects:
1.Maintain a healthy lifestyle:Regular work and rest, balanced diet, and moderate exercise.
2.Managing stress:Relieve stress through meditation, yoga, and more.
3.Regular physical examination:Have an annual gynecological exam to detect potential problems in a timely manner.
4.Pay attention to weight changes:Keep your weight within a healthy range.
5.Seek medical attention promptly:If menstrual abnormalities last for more than 3 months, you should seek medical treatment in time.
5. Recent popular related issues
According to the hot topics on the Internet in the past 10 days, the following are frequently asked questions about the menstrual cycle:
| Popular questions | brief answer |
|---|---|
| Will the COVID-19 vaccine affect the menstrual cycle? | Some women report temporary changes in their menstrual cycle, but this usually resolves within 1-2 cycles |
| Will staying up late cause delayed menstruation? | Staying up late for a long time may affect hormone secretion and lead to irregular menstruation. |
| What should I do if my period doesn’t come after dieting to lose weight? | It is necessary to resume a balanced diet and seek medical attention to check hormone levels if necessary. |
| What causes the menstrual cycle to suddenly become shorter? | May be a sign of stress, hormonal changes, or reduced ovarian function |
6. When Do You Need Medical Treatment?
You should seek medical treatment promptly when the following situations occur:
1. Menstrual cycle continues<21天或>35 days
2. Menstrual flow suddenly increases or decreases significantly
3. Menstrual pain seriously affects daily life
4. Still not having menarche at 16 years old
5. Menopause for more than 3 months (non-pregnancy period)
The menstrual cycle is a barometer of women's health. Understanding the normal range of the menstrual cycle and its influencing factors can help detect potential health problems in time. If you have questions about your menstrual cycle, it is recommended to consult a professional doctor.
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