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The menstrual cycle is a cycle of body changes that occurs in females that reached the age of puberty. Unfertilized eggs are disposed by the body in the form of blood coming out of the vagina.
Before puberty, females and males both produce about the same amounts of estrogen and androgens. When puberty hits for males, more androgens than enstrogen is produced causing a change in voice and hair distribution. When puberty hits for females more estrogen than androgens is produced causing a monthly menstrual cycle, changes in their breasts and bone structure.
Around 5-8 months. And its not puberty, its a heat cycle :)
Yes, a female can have a menstrual cycle at 9 years old. The average age of menarche (first period) is 13 years old, but it is possible for females to enter puberty and start ovulating (thus menstruating) from only 9 years old.
They survive thourgh the water cycle. First it starts in evaporation,condensation,precipitation,runoff and then transpiration. It then starts all over again.
menstruation
Menstruation Cycle!! Or known as periods!!
The ending of a females cycle signals the start of another.
Some females become physically ill, others just experience annoying discomfort.
Puberty triggers all these developments. Menstruation shows that you are fertile and capable of reproduction.
The opposite of menopause is puberty. Menopause refers to the end of a woman's reproductive cycle, whereas puberty signifies the beginning of it.
No puberty is what makes you have a period. It can take up to 2 years until you are regular though.