menstrual cycle Flashcards
1
Q
what is the menstrual cycle?
A
- Changes within the uterus
- Uterine bleeding, accompanied by shedding of the endometrium
2
Q
what is the menarche?
A
first menstruation
3
Q
what is menopause
A
end of fertile period
4
Q
what happens during the menstrual cycle?
A
- If fertilisation doesn’t occur, corpus luteum breaks down
- Progesterone secretion drops causing uterine lining to be shed
- If fertilization does occur, high progesterone levels maintain the thickened uterine lining.
- Placenta develops and nourishes the embryo completely by 12 weeks