Menstrual Cycle 9th Grade Health Menstrual Cycle • The cycle begins when an______starts to mature in one of the ______________. • Egg • Ovaries • 22. The lining of the _______thickens to prepare for ___________. • Uterus • Pregnancy • Progesterone is responsible for this!!! – Maintaining growth of the endometrium for implantation of a fertilized egg Lining= Endometrium • 23. If the egg is not fertilized, the lining breaks down and is discharged. This discharged of dead tissue and blood is called__________. • Menstruation • Menarche is the first menstrual period, this usually occur between the age of 10 and age 16 • 24. The cycles takes about 21-35 days. The blood flow occurs for the first 3-7 days of the cycle. • Estrogen has reached its highest level 2 days before ovulation • Ovulation occurs about midways through the cycle (about day 14) – Endometrium is at the thickest point! – Luteinizing Hormone(LH) signals the release of ovum from ovary-ovulation – If egg is not fertilized by the time that it reaches the uterus progesterone and estrogen levels drop. 25.Factors affecting Menstruation are: – Diet – Illness – Travel – Exercise – Weight gain/loss Every women is different • • • • • Age Menstruation begins Length # of days Cramps Back Pain Premenstrual syndrome (PMS) • Occurs before the menstrual period – Nervous tension – Mood swings – Headaches – Bloating – Irritability • May be caused by hormone levels • Approximately 85% of women who menstruate report changes in the days or weeks before their menstruation that cause problems that affect their normal lives. This is known as Premenstrual Syndrome (PMS). Menopause • The ovaries slow down hormone production and stop releasing an egg. This takes place around the ages____________. • 45-55 Endometriosis • Tissue from the lining of the uterus grows outside the uterus, in the pelvic cavity. • Causes pain in pelvic areas, especially during menstruation. • Can lead to sterility • Can be corrected with hormones or surgical removal of unwanted tissue. • Endometriosis affects more than 5 million American women, including teen girls. • It's not always diagnosed right away in teens because at first they or their doctors assume that their painful periods are a normal part of menstruating.