Puberty And The Menstural Cylcle Flashcards
Where is oestrogen produced?
Ovaries
Why is ovulation?
When eggs mature and are released very 28days
What is the main femal reproductive hormone ?
Oestrogen
What is the main male reproductive hormone?
Testosterone
Where is testosterone produced?
Testes
What does testosterone do?
Stimulates sperm production
What does FSH stand for ?
Follicle stimulating hormone
What does LH stand for ?
Lutenising hormone
What does LH do ?
Stimulates the release of the egg
Ovulation
What does fSH do ?
Causes maturation of the egg in the ovary
Stimulates the ovaries to produce oestrogen
What does oestrogen do ?
Causes uterus lining to grow
Stimulates LH release
Inhibits release of FSH
What is the first stage of the meatiest cycle?
Menstruation starts
The uterus lining breaks down for about four days
What is the second stage of the menstural cycle?
The uterus lining builds up again
Ready to revive a fertilised egg
What is the third stage of the menstural cycle?
An egg develops and is released
Ovulation
What is the fourth stage of the menstural cycle?
The wall is then maintained for 14days
If no eggs lands by day 28 the cycle restarts
Where is progesterone produced?
Ovaries
What does progesterone do ?
Maintains the lining of the uterus- when progesterone falls the lining breaks down
Inhibits the release of LH and FSH
Why are hormonal ways of stopping pregnancy?
- pull of oestrogen and progesterone
- patch containing oestrogen and progesterone
- implant that releases continuous amount of progesterone
Why are oestrogen and progesterone used to prevent pregnancy?
The inhibit the release of FSH so the egg cannot mature
Progesterone thickens the lining so sperm cannot get through
What are non hormonal ways to prevent pregnancy?
- male and female condoms
- diaphragm-plastic cup
- abstinence
- sterilisation
- spermicide
What are the advantages To IVF?
Fertility can give an infertile couple a child
What are the downside to IVF?
- multiple births
- low success
- expensive
- stressful
Why are the stages of IVF treatment?
Give mother doses of FSH and LH stimulates maturation of eggs
The eggs and soerm are collected in a lab
The fertilisers eggs develop into embryos
Then inserted into the mother’s uterus when they are tiny balls of cells
Name the hormone that stimulates the egg to nature in the ovary
FSH
Give one drawback if using hormone to increase fertility
- expensive
- multiple pregnancies
- doesn’t always work
What is the role of FSH and LH during IVF?
Stimulates everlasting eggs to mature
Which hormone is responsible for the maintaining of the uterus lining ?
Progesterone
On what day of the mensural cycle is the egg released?
Day 14
What effect does oestrogen have on the release of FSH?
Inhibits it
