Menstrual Cycle. Menstrual Cycle. Definition – series of events controlled by hormones preparing the uterus for reception of the fertilized egg cell. Menstruation (Days 1-5) – lining of uterus is discharged a. Corpus luteum dies – then lining is discharged
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Definition – series of events controlled by hormones preparing the uterus for reception of the fertilized egg cell
a. Corpus luteum dies – then lining is discharged
b. Progesterone – when corpus luteum dies, amount of this hormone decreases in quantity due to failure of egg fertilization
c. Follicle-stimulating hormone – begins to increase
a.FSH levels continue to rise
b.Several follicles develop, only one will ovulate
c.Follicle secretes estrogen
d.Estrogen more LH being made
e.Uterus lining thickens
f.LH peaking triggers ovulation
a.Ruptured follicle corpus luteum
b.Corpus luteum makes progesterone thicker endometrium
c.High levels of progesterone inhibits FSH production
6. Estrous cycle
Some also thicken the mucus around the cervix to prevent sperm into the uterus as well as making it difficult to implant on the uterine wall.
How do you still menstruate?
7 placebo pills a month