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Biology Paper 2
Topic 5 - Homeostasis and response
Controlling fertility
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Cards (15)
Name all methods of contraception using hormones oeastrogen and progesterone
contraceptive pills
contraception patches
contraception implant
contraceptive injection
IUD
( intrauterine device)
Name non-hormonal methods of contraception
condoms
a
diaphragm
spermicide
abstinence
natural methods
sterilisation
How long does the contraceptive patch last?
One
week
How long does the contraceptive implant last?
Three years
How long does the contraceptive injection last?
2 to 3
months
How many types are there of IUD and what is the difference?
There are 2 types : plastic and
copper
Plastic release
progesterone
Copper prevent the sperm surviving in the uterus
What do condoms do?
Prevent
sperm
entering the vagina and protect against
STD
What does diaphragm do?
It fits over the
cervix
to form a barries and it has to be used with
spermicide
What does spermicide do?
Disables
ot
killd
the sperm
What does IVF stand for?
In vitro fertilisation
What is the
IVF
?
It is the treatment to help woman get pregnant
How does IVF work?
Woman has to inject hersef with hormones
FSH
and
LH
to trigger the release
oestrogen
and to make more eggs to mature
What happens after inject of FSH and LH in IVF?
Few eggs are collected from woman`s ovaries using needle, after they get fertilised with father`s sperm in
lab
What is the last step of IVF?
Two or more of
embryos
are transferred in the uterus fr
implantation
What are the disadvantages of IVF?
ethical issues as not used
embryos
get destroyed
multiple births
can happen
the succes rate is quite
low
emotionally
and
physicall
hard for women