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Menstrual Cycle

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Clarisavel Garcia

on 29 October 2013

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Transcript of Menstrual Cycle

When your body starts to change..
What is Menstruation?
To Put it in Simpler Terms:
When will these "Changes" start to happen?
Puberty does not start at one specific age, It ranges from earlier to later depending on each individual! Generally girls start to mature as early as age 8 and may be through with puberty at age 16.
Here's what you will see:
Your breasts will grow! Starting with the flat area around the nipple (the areola) becoming enlarged and breast tissue forming under the nipple.
Hair will start to grow in different places: Legs, underarms and in your Pubic Area.
Growth spurt! The average growth during this time is 3.5 inches a year!
Weight gain, but don't panic, this is essential for getting breasts, growing taller and menstruation.
Sweat and Oil producing glands also start developing, accompanied by the possibility of Acne!
During puberty your emotions may start to change, you may even feel like your on an emotional roller coaster.. Good news: this is normal! These different emotions come from hormonal changes during Puberty, especially in coordination to one of the biggest steps during puberty for a girl...

Menstruation is one of the biggest steps into womanhood for a young girl going through puberty.
Menstruation is...
(Commonly referred to as your "period") is a monthly occurrence when your body sheds the lining of the uterus . Menstrual blood flows from the uterus through the small opening in the cervix and passes out of the body through the vagina. This shedding happens in the absence of a fertilized egg.
This happens because of your Menstrual cycle:
Important Hormones and Your Menstrual cycle

Estrogen and Progesterone: These hormones are important because they both make the lining of the uterus grow and thicken. This lining of the uterus is the place that would nourish the embryo if a pregnancy occurs.
Follicle Stimulating Hormone(FSH): This hormone is responsible for stimulating growth of the ovarian follicle, the cells surrounding the egg that produce the hormones needed to support pregnancy, and the fluid around the egg.
Luteinizing Hormone(LH): Its main purpose is to trigger ovulation. The rise in the blood level of LH that starts ovulation is called the LH surge
Gonadotropin-releasing hormone(GnRH) :released by the hypothalamus, Causing a chemical reaction in the pituitary gland , which stimulates the production of FSH and LH
What is Puberty?
Puberty is a time in which a young girls body goes through a variety of physical changes, It is an emotional process that prepares the body for the purpose of reproduction.
By definition: the period during which adolescents reach sexual maturity and become capable of reproduction.
Puberty is....
Heres how you may feel...
But why does this happen?
A menstrual cycle is the time from the first day of one period to the first day of the next. The average cycle is 28 days, but that does not mean that the numbers are the same for every girl!
The rise and fall of levels of hormones during the month control the menstrual cycle.
Anatomy of the Female Reproductive system
Day by Day Menstrual Cycle
Day 1 -5:
These are the days where your shedding the lining of your uterus, or "bleeding". This shedding of the uterine lining is caused by the fall of the levels of hormones after the end of the previous cycle. Without a fertilized egg, there is no need for the lining to be thickened.
Day 7 to 14:
Once bleeding has ended, Follicles, which each contain one egg, develop in the ovaries. One lucky follicle will continue to develop and reach maturity. Outside of the ovaries, the Uterine lining is continuously thickening to prepare for the egg, released through the fallopian tubes. The egg will leave behind tissue that once surrounded it, that tissue is call the Corpus Luteum.
On day 14
FSH will signal the ovaries to begin producing estrogen which stimulates LH levels to surge, leading to the follicle with the mature egg to burst and release from the ovary, this is called

The egg will then continue down the fallopian tube to the uterus.
Day 14 to 28
If the egg is not fertilized within this time period the hormone levels will begin to drop by day 25. This is the beginning of the new cycle. The egg will break apart and shed along with the uterine lining.





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