A. Directions: Complete the paragraph below. Do it in your Science journal of notebook? I learned that Menstrual cycle is a (1) series of hormonal changes leading to egg (2) and 3) preparation for a possible (4) Menstruation is the stage of the (5) cycle usually lasting from (6) to (7) days during which blood, some uterine tissues and the (8) egg are expelled from the vagina The menstrual flow occurs when the (9)_ is not fertilized by a (10)_ cell B. Suggested Enrichment/Reinforcement Activity fies List some myth that you heard about menstruation Explain why you believe them or not
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Menstrual Cycle: An Overview
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The Menstrual Cycle: An Overview
Illustration demonstrating the menstrual cycle
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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.