bio stuff i keep forgetting

how does oestrogen reduce fertility

It prevents the release of a egg. This is because if oestrogen is takne every day then it inhibits the production of FSH then production of eggs stop

how does progesterone stop fertility

It stimulates the production of thick mucus which prevents any sperm getting through tp the egg.

what is a contraceptive patch

A patch which contains oestrogen and progesterone which is stuck to the skin and lasts for a week

what is a contraceptive implant

its inserted under the skin of the arm. It releases a continuous amount of progesterone which stops the ovaries releasing eggs making it hard for the sperm to swim to the egg stopping any fertilised egg implanting in the uterus. Any implant can last 3 years

What is a contraceptive injection

contains progesterone and each dose lasts 2 - 3 months

what is IVF

Involves collecting eggs from the womens ovaries and fertilising them in a lab using the mans sperm

describe the process of IVF

1. The sperm is injected directly into the egg

2. the fertilised egg are then grown into embryos in a lab incubator

3. Once the embryos are tiny balls of cells, one or two of them are transferred to the womens uterus improving the chance of pregnancy

   4. FSH and LH are given before the egg collection to stimulate several eggs to mature

adv of IVF

it can give a infertile couple a child

DISADV of IVF

• it has a low success rate meaning its a stressful and doften upsetting process

why are some people against IVF

It often results in used embryos which are eventually destroyed because some poeple think that its ehtical and damaging to potential human life