It's the follicle stimulating hormone and it stimulates an egg to develop
2 of 22
What does progesterone do?
It maintains the uterus wall
3 of 22
What is the LH and what does it do?
The luteinising hormone controls ovulation
4 of 22
What are both the luteinising hormone and the FSH released by?
The pituitary gland in the brain
5 of 22
What happen if fertilisation doesn't occcur?
If fertilisation doesn't happen, progesterone and oestrogen levels decrease
6 of 22
What happens when oestrogen and progesterone levels are low?
Menstruation occurs and a message is sent to the hypothalamus. This starts the cycle again.
7 of 22
What is the menstrual cycle triggered by?
The receptors in the hypothalamus gland
8 of 22
What happens when fertilisation occurs?
The level of progesterone stays high and no FSH is produced, no more eggs develop and the uterus lining doesn't break down (you don't menstruate)
9 of 22
What is artificial insemination?
When sperm is placed into the v a g i n a by syringe
10 of 22
Why do people use FSH for infertility treatments?
To stimulate egg development
11 of 22
What is IVF?
When an egg is fertilised by sperm outside the body (n glass)
12 of 22
What is surrogacy?
When a fertilised egg is placed inside a surrogate mother (another female)
13 of 22
What are some advantages and disadvantages for such fertility treatments?
They increase the chances of a successful fertilisation and pregnancy. However some disagree and say that such treatments are too expensive for the individual and the NHS.
14 of 22
What are disadvantages and risks of using IVF?
It costs about £6000, with a 25% success rate and has risks of multiple births and lower birth weights.
15 of 22
What is egg donation?
Where an egg is donated from another women, then fertilised and placed inside the uterus
16 of 22
How can foetal development be checked for abnormalities?
By amniocentesis and chromosomal analysis
17 of 22
What is amniocentesis?
When cells from the amniotic fluid are extracted and tested
18 of 22
What is chromosomal analysis?
When a blood test is used to test cells for any chromosomal abnormalities
19 of 22
Why does foetal screening raise ethical issues and risks?
People argue that it's not right to interfere with a natural process and whether an unborn foetus has a right to life. There is also a small risk of expulsion of the foetus.
20 of 22
How can fertility in humans be controlled? Examples?
By artificial sex hormones. E.g. the contraceptive pill and fertility drugs
21 of 22
How does contraception (artificial female sex hormones) reduce fertility?
The hormones prevent ovulation by mimicking pregnancy and this inhibits FSH release. Therefore the eggs in the ovary aren't stimulated to develop
22 of 22
Other cards in this set
Card 2
Front
What is the FSH and what does it do?
Back
It's the follicle stimulating hormone and it stimulates an egg to develop
Card 3
Front
What does progesterone do?
Back
Card 4
Front
What is the LH and what does it do?
Back
Card 5
Front
What are both the luteinising hormone and the FSH released by?
Comments
No comments have yet been made