Why does menstruation occur?
Understand the Problem
The question is asking about the reasons and physiological processes that lead to menstruation, which is a normal biological function in females.
Answer
Menstruation occurs when the egg is not fertilized, leading the uterus lining to shed.
Menstruation occurs when the egg is not fertilized, causing the lining of the uterus to break down and bleed.
Answer for screen readers
Menstruation occurs when the egg is not fertilized, causing the lining of the uterus to break down and bleed.
More Information
Menstruation is a regular biological process that prepares the female body for pregnancy by shedding the endometrial lining when fertilization does not occur. This cycle is regulated by hormonal signals, primarily estrogen and progesterone.
Tips
A common mistake is to confuse the role of hormones such as estrogen and progesterone, which regulate the cycle, but they do not directly cause menstruation. It's the lack of fertilization that triggers the uterine lining to shed.
Sources
- Why Does Menstruation Occur? | KidsHealth - kidshealth.org
- Menstrual Cycle - Merck Manual Consumer Version - merckmanuals.com
- Why Do Women Have Periods? - Healthline - healthline.com
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