Periods or the Menstrual Cycle in Women

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Periods or the Menstrual Cycle in Women


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In this article we will look at:

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What is periods or menstruation?

Monthly periods, or menstruation or the menstrual cycle is body’s way of preparing for pregnancy each month in a woman. It is when the body sheds the lining of the uterus and the menstrual blood flows from the uterus through the cervix and the vagina and finally out of the body. For most women, the menstrual cycle each month lasts for three to five days. 

What is the regular period/menstruation cycle?


A menstruation cycle is the normal regular cycle of menstruation or periods occurring every month in a woman, signifying that all the important parts of the body are functioning properly. 

The menstruation cycle prepares the body for pregnancy every month and also helps cause hormonal changes in the body to keep a woman healthy. 

Hormones are chemicals generated by glands in the body that controls most of the major bodily functions, from simple basic needs like hunger to complex systems like reproduction, and even the emotions and mood. In a woman, among other hormones, estrogen and progesterone are the key hormones produced by the ovaries. 

The average menstrual cycle among women is usually 28 days. The first day of the menstrual cycle is when blood starts to flow out from the vagina. 
The complete duration of a menstrual/period cycle can be divided into four main phases:

  1. Menstrual phase (From day 1 to 5)
  2. Follicular phase (From day 1 to 13)
  3. Ovulation phase (Day 14)
  4. Luteal phase (From day 15 to 28)

After the peak, both estrogen and progesterone fall, triggering your next period to begin. This marks the end of one menstrual cycle and the beginning of the next one.

What occurs during a period/menstrual cycle?




This is how a menstrual cycle runs:

When does a girl experience her first period?

Though every girl’s body has its own schedule in preparing for the first period or menstruation, the average age in India for a girl to experience her first period is between 10 to 13 years. 

What are the symptoms that occur before the periods/menstruation cycle?

Some women experience symptoms before or while menstruating. This is called Premenstrual Syndrome (PMS)

Some common symptoms triggered by the two main hormones, estrogen and progesterone are: 

Estrogen effects:

Progesterone effects: 

For how long does a period/menstruation normally continue in a month?

For most women, a period lasts for around approximately five days. 

How long does a woman continue menstruating in her life? 

Women continue menstruating till they reach a phase in their lives known as menopause which usually occurs between the ages 45 - 50 years. 

Some women may experience early menopause due to medical reasons such as undergoing hysterectomy

Why are periods/menstruation cycles irregular in some women?

For some women, the time between periods and the amount of blood shed during menstruation vary considerably. This is known as irregular menstruation. Irregular menstruation may have different causes such as:

For what reasons can a woman miss her periods or monthly menstruation cycle?

A  woman may experience late period or miss periods due to a variety of reasons such as:

Why do some women experience menstruation/period cramps/pains? 

Women can experience pains or cramps during menstruations due to various reasons such as: 

How often should a girl change her sanitary pad/tampon during her periods or while she is menstruating?

You should change your sanitary pad before it becomes completely soaked with blood and unable to retain the blood. If you use a tampon you should change it every 4 to 8 hours. A girl will easily understand when she needs to change her pad/tampon. 

For what kind of periods/menstruation related problems should a doctor be consulted? 

You need to consult a doctor if you experience the following symptoms related to menstruation: 

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Did you know?

A Rare Period Disorder

According to a case study published in the medical journal, Ophthalmic Plastic & Reconstructive Surgery, a rare condition known as vicarious menstruation can cause women to bleed from organs other than the uterus, such as their eyes. This occurs when the endometrial tissue (that normally grows in the uterus and sheds during menstruation) is transmitted through the bloodstream. This condition however, is luckily very rare.

Asthma symptoms can worsen during periods

According to a study published in the journal "Multidisciplinary Respiratory Medicine", increased sensitivity to allergens occur in the week leading up to the period.  Between 19 and 40 % of the women suffering from asthma experience what is known as premenstrual asthma (PMA).

A nightlight can regulate your menstrual cycle

A study published in the journal "Psychiatry Research" back in the early 90s shows that sleeping with the light on during the last two weeks of the period cycle can have therapeutic properties. Light exposure affects the secretion of the sleep hormone melatonin, that helps to control the release of the female reproductive hormones which determine when the menstrual cycle begins and ends. The study discovered that when women experiencing extra long or irregular cycles slept next to a regular 100-watt light bulb for a few days, during the last two weeks of their cycles, it invariably shortened their menstrual cycles by an average of 12 days. This study showed that a targeted approach could be used to regulate irregular periods. The method to be followed is to sleep with the light on during the last two weeks of your cycle. However, keeping the light on everyday at night can have an adverse effect, as this might make the periods more irregular, which is something women working shift jobs suffer from.

Related videos

The Menstrual Cycle

Why Do Women Have Periods?

Questions Every Woman Wants To Ask A Gynaecologist

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