The Menstrual Cycle Flashcards
(19 cards)
What is the first menstrual cycle called?
Menarche
How often does a new menstrual cycle typically begin?
Approximately every 28 days
What are the two main cycles in the menstrual cycle?
- Ovarian cycle
- Uterine cycle
What hormone does the hypothalamus release to stimulate the pituitary gland?
A hormone that stimulates the pituitary
What hormones are secreted by the pituitary gland during the menstrual cycle?
- FSH (follicle-stimulating hormone)
- LH (luteinizing hormone)
What is the function of FSH and LH in the ovarian cycle?
Stimulate the growth of one of the follicles in the ovary and ovulation
What hormones cause the endometrium to thicken during the uterine cycle?
- Oestrogens
- Progesterone
What happens to the endometrium if fertilization does not occur?
It breaks down
What is menopause?
The permanent cessation of menstruation resulting from the loss of ovarian function
What is the role of oestrogens in the pre-ovulation phase?
Allow the mucous membrane of the uterus to regenerate
Fill in the blank: The follicle grows and matures during the _______ phase.
Follicular
What is created in the endometrium during the post-ovulation phase?
A network of blood capillaries
True or False: Ovulation always occurs on the same day in every menstrual cycle.
False
What is released into the Fallopian tube during ovulation?
The ovum
What happens to the corpus luteum if the ovum is not fertilized?
It decomposes and eventually disappears
What efeect has the progesterone?
Is produced by the ovaries because the endometrium thickens, progesterone occurssin the luteal phase.
What changes can occur in the menstrual cycle over time?
It can be longer or shorter, and ovulation can come a few days early or late
What is the significance of the endometrium thickening?
It prepares the uterus for a possible pregnancy
When the levels of lh are more higher ?
Are more higher in the ovulation.
