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called menstruation.
anterior pituitary.
pudin Directions: Arrange the sequence of the important events during the menstrual cycle by
uterine lining break off and leave thru the vagina. The unfertilized egg is lost and
The thick uterine lining is no longer necessary, so the cells of the thickened
Some blood is lost too. This loss of cells from the uterus lining, blood and egg is
The hypothalamus sends a gonadotropin-releasing hormone (GnRH) to the
The FSH assists in the maturation of the follicles and causes the secretion of
estrogen from the follicles.
If fertilization occurs, the developing embryo will be implanted in the
endometrium and the ovary itself releases the hormone estrogen which causes the
uterine lining to increase in thickness.
Gonadotropin releasing hormone (GnRH) from the hypothalamus
stimulates luteinizing hormone (LH) and follicular stimulating hormone (FSH) are
released from the anterior pituitary gland.
The hypothalamus monitors and causes the release of hormones from the
pituitary gland.
After menstruation, the cycle starts again.
LH and FSH are gonadotropins that act primarily on the ovaries in the
female reproductive tract.
The LH initiates the maturation of the follicles, converts ruptured follicles
into corpus luteum and causes the secretion of progesterone
If fertilization doesn't occur, the corpus luteum eventually degenerates, the
estrogen and progesterone levels drop, and the endometrium can no longer
strual
be​

Sagot :

LegendBrain

Answer:

What is ovulation?

When a young woman reaches puberty, she starts to ovulate. This is when a mature egg or ovum is released from one of the ovaries. The ovaries are the two female reproductive organs found in the pelvis. If the egg is fertilized by a sperm as it travels down the fallopian tube, then pregnancy occurs. The fertilized egg attaches to the lining of the uterus. The placenta then develops. The placenta transfers nutrition and oxygen to the fetus from mother. If the egg does not become fertilized, the lining of the uterus (endometrium) is shed during menstruation.

The average menstrual cycle lasts 28 days. The cycle starts with the first day of one period and ends with the first day of the next period. The average woman ovulates on day 14. At this time, some women have minor discomfort in their lower abdomen, spotting, or bleeding, while others do not have any symptoms at all.

A woman is generally most likely to get pregnant (fertile) if she has sex a few days before, and during ovulation.

What is menstruation?

Menstruation is one part of a woman's cycle when the lining of the uterus (endometrium) is shed. This occurs throughout a woman's reproductive life. With each monthly cycle, the endometrium prepares itself to nourish a fetus. Increased levels of estrogen and progesterone help thicken its walls. If fertilization does not occur, the endometrium, along with blood and mucus from the vagina and cervix make up the menstrual flow that leaves the body through the vagina during the period.

When does menstruation start?

On average, a young woman in the U.S. has her first menstrual period at about age 12. This is generally 2 to 3 years after her breasts start to grow. This is also soon after she notices pubic and underarm hair. Stress, strenuous exercise, and diet can affect when a girl first has her period.

The American College of Obstetricians and Gynecologists recommends that a young woman consult her healthcare provider if she has not started to menstruate by the age of 15, or if she has not begun to develop breast buds, pubic hair, or underarm hair by the age of 13.

How long is a menstrual cycle?

For menstruating women, an average menstrual cycle lasts 28 days. It starts with the first day of the last period and ends with the first day of the next menstrual period. However, the length of women's cycles varies, particularly for the first year or 2 after a young woman has her first period. Women may have cycles as short as 21 days, or as long as 45 days during the first few years. However, anything outside of this range may require medical attention

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