Modern women in developed countries have many more menstrual periods than in the last century or in poor countries.
Scientists suggest that this is caused by fewer pregnancies and reduced breastfeeding, writes the Washington Post.
For example, a woman from Holland can have about 450 periods in her lifetime, which equals about 8 years.
But a woman from Mali (a country in Africa – ed.) has only 100 menstrual periods in her lifetime due to a large number of pregnancies.
Scientists also note that the onset of menstruation occurs at a younger age than in previous generations.
According to the clinical description, menstruation is considered normal, which:
- occurs every 24-38 days;
- bleeding lasts no more than 8 days;
- the cycle is regular, with a deviation of no more than 7-9 days;
- blood volume is moderate.
Bleeding that forces you to change a pad or tampon every 1-2 hours is considered severe, there are blood clots over 2.5 cm long, you have to change the pad at night.
Why the menstrual cycle can fluctuate
Doctors warn that periods may disappear from time to time. Among the reasons:
This is the most common cause of delayed menstruation. Therefore, you should first take a pregnancy test. It should be remembered that bleeding can still occur in the first trimester.
This is a pathological process inside the body that occurs when uterine tissue grows outside the uterus. It can cause abnormal bleeding.
- Stress and sports
There are a number of actions that have consequences for the menstrual cycle. So a delay can happen due to stress (for example, from traveling or preparing for a big exam), extreme physical exertion, a significant change in weight, poor diet, acute illness, etc.
Scientists have found that vaccination against COVID is associated with a small temporary increase in cycle length and can cause more massive bleeding than usual.
However, these changes usually disappear by the next menstrual cycle after vaccination.
It will be recalled that scientists recently conducted a study on changes in a woman’s brain during menstruation.
Read also: 10 uncomfortable questions about women’s health – answers from a gynecologist